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J. Alfred Witjes

J. Alfred Witjes

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Medicine 115 4488 4211 170 166 677 57729

J. Alfred Witjes publications per year

The chart shows the history of publications by J. Alfred Witjes between 1989 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. J. Alfred Witjes published across 37 years, from 1989 to 2025, averaging 19.4 papers a year. Output peaked at 54 publications in 2021. 29 of the 718 publications appeared in the last two years.

No. of publications
10 20 30 40 50
Bar chart. Horizontal axis: year, 1989 to 2025. Vertical axis: number of publications, 0 to 54. Peak 54 publications in 2021. 1989: 1 publication 1990: 2 publications 1991: 4 publications 1992: 5 publications 1993: 6 publications 1994: 4 publications 1995: 2 publications 1996: 3 publications 1997: 6 publications 1998: 11 publications 1999: 7 publications 2000: 10 publications 2001: 7 publications 2002: 6 publications 2003: 10 publications 2004: 16 publications 2005: 26 publications 2006: 41 publications 2007: 45 publications 2008: 39 publications 2009: 39 publications 2010: 21 publications 2011: 35 publications 2012: 32 publications 2013: 36 publications 2014: 26 publications 2015: 21 publications 2016: 26 publications 2017: 14 publications 2018: 28 publications 2019: 26 publications 2020: 29 publications 2021: 54 publications 2022: 25 publications 2023: 26 publications 2024: 14 publications 2025: 15 publications
1989 2025

718 publications in total across all disciplines

View publications per year as a table
J. Alfred Witjes: publications per year, 1989 to 2025
Year Publications
1989 1
1990 2
1991 4
1992 5
1993 6
1994 4
1995 2
1996 3
1997 6
1998 11
1999 7
2000 10
2001 7
2002 6
2003 10
2004 16
2005 26
2006 41
2007 45
2008 39
2009 39
2010 21
2011 35
2012 32
2013 36
2014 26
2015 21
2016 26
2017 14
2018 28
2019 26
2020 29
2021 54
2022 25
2023 26
2024 14
2025 15
Total 718
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J. Alfred Witjes publication distribution in Medicine in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Medicine in 2026. The highlighted bar marks where J. Alfred Witjes sits on this spectrum.

No. of scientists
200 400 600 800
Bar chart with 86 bars. Horizontal axis: publications, 101–120 to 1,796+. Vertical axis: number of scientists, 0 to 922. Most scientists, 922, have 341–360 publications. The last bar groups every scientist with 1,796 publications or more. The highlighted bar, 661–680 publications, is where this scientist sits. 101–120 publications: 5 scientists 121–140 publications: 26 scientists 141–160 publications: 73 scientists 161–180 publications: 155 scientists 181–200 publications: 230 scientists 201–220 publications: 363 scientists 221–240 publications: 487 scientists 241–260 publications: 545 scientists 261–280 publications: 722 scientists 281–300 publications: 768 scientists 301–320 publications: 834 scientists 321–340 publications: 895 scientists 341–360 publications: 922 scientists 361–380 publications: 838 scientists 381–400 publications: 861 scientists 401–420 publications: 918 scientists 421–440 publications: 806 scientists 441–460 publications: 771 scientists 461–480 publications: 751 scientists 481–500 publications: 713 scientists 501–520 publications: 617 scientists 521–540 publications: 610 scientists 541–560 publications: 537 scientists 561–580 publications: 504 scientists 581–600 publications: 509 scientists 601–620 publications: 396 scientists 621–640 publications: 386 scientists 641–660 publications: 371 scientists 661–680 publications: 340 scientists 681–700 publications: 336 scientists 701–720 publications: 307 scientists 721–740 publications: 259 scientists 741–760 publications: 230 scientists 761–780 publications: 228 scientists 781–800 publications: 217 scientists 801–820 publications: 204 scientists 821–840 publications: 186 scientists 841–860 publications: 177 scientists 861–880 publications: 155 scientists 881–900 publications: 139 scientists 901–920 publications: 145 scientists 921–940 publications: 116 scientists 941–960 publications: 133 scientists 961–980 publications: 91 scientists 981–1,000 publications: 96 scientists 1,001–1,020 publications: 77 scientists 1,021–1,040 publications: 70 scientists 1,041–1,060 publications: 63 scientists 1,061–1,080 publications: 77 scientists 1,081–1,100 publications: 49 scientists 1,101–1,120 publications: 54 scientists 1,121–1,140 publications: 49 scientists 1,141–1,160 publications: 51 scientists 1,161–1,180 publications: 35 scientists 1,181–1,200 publications: 39 scientists 1,201–1,220 publications: 26 scientists 1,221–1,240 publications: 37 scientists 1,241–1,260 publications: 36 scientists 1,261–1,280 publications: 27 scientists 1,281–1,300 publications: 32 scientists 1,301–1,320 publications: 28 scientists 1,321–1,340 publications: 17 scientists 1,341–1,360 publications: 30 scientists 1,361–1,380 publications: 28 scientists 1,381–1,400 publications: 17 scientists 1,401–1,420 publications: 21 scientists 1,421–1,440 publications: 15 scientists 1,441–1,460 publications: 12 scientists 1,461–1,480 publications: 12 scientists 1,481–1,500 publications: 18 scientists 1,501–1,520 publications: 14 scientists 1,521–1,540 publications: 17 scientists 1,541–1,560 publications: 15 scientists 1,561–1,580 publications: 6 scientists 1,581–1,600 publications: 2 scientists 1,601–1,620 publications: 12 scientists 1,621–1,640 publications: 11 scientists 1,641–1,660 publications: 8 scientists 1,661–1,680 publications: 5 scientists 1,681–1,700 publications: 5 scientists 1,701–1,720 publications: 10 scientists 1,721–1,740 publications: 12 scientists 1,741–1,760 publications: 14 scientists 1,761–1,780 publications: 6 scientists 1,781–1,795 publications: 5 scientists 1,796+ publications: 100 scientists
101–120 publications 1,796+

This scientist: 677 publications — 79th percentile

79% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,796 publications or more.

View publications distribution as a table
Number of Medicine scientists by publication count, Research.com 2026 ranking edition. Based on 20,134 ranked scientists.
Publications Scientists This scientist
101–120 5
121–140 26
141–160 73
161–180 155
181–200 230
201–220 363
221–240 487
241–260 545
261–280 722
281–300 768
301–320 834
321–340 895
341–360 922
361–380 838
381–400 861
401–420 918
421–440 806
441–460 771
461–480 751
481–500 713
501–520 617
521–540 610
541–560 537
561–580 504
581–600 509
601–620 396
621–640 386
641–660 371
661–680 340 677
681–700 336
701–720 307
721–740 259
741–760 230
761–780 228
781–800 217
801–820 204
821–840 186
841–860 177
861–880 155
881–900 139
901–920 145
921–940 116
941–960 133
961–980 91
981–1,000 96
1,001–1,020 77
1,021–1,040 70
1,041–1,060 63
1,061–1,080 77
1,081–1,100 49
1,101–1,120 54
1,121–1,140 49
1,141–1,160 51
1,161–1,180 35
1,181–1,200 39
1,201–1,220 26
1,221–1,240 37
1,241–1,260 36
1,261–1,280 27
1,281–1,300 32
1,301–1,320 28
1,321–1,340 17
1,341–1,360 30
1,361–1,380 28
1,381–1,400 17
1,401–1,420 21
1,421–1,440 15
1,441–1,460 12
1,461–1,480 12
1,481–1,500 18
1,501–1,520 14
1,521–1,540 17
1,541–1,560 15
1,561–1,580 6
1,581–1,600 2
1,601–1,620 12
1,621–1,640 11
1,641–1,660 8
1,661–1,680 5
1,681–1,700 5
1,701–1,720 10
1,721–1,740 12
1,741–1,760 14
1,761–1,780 6
1,781–1,795 5
1,796+ 100
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J. Alfred Witjes D-index placement in Medicine in 2026

The chart shows the D-index (discipline H-index) distribution of Medicine scientists ranked by Research.com in 2026. The highlighted bar marks where J. Alfred Witjes sits on this spectrum.

No. of scientists
250 500 750 1,000
Bar chart with 75 bars. Horizontal axis: D-Index, 70–71 to 217+. Vertical axis: number of scientists, 0 to 1,027. Most scientists, 1,027, have 82–83 D-Index. The last bar groups every scientist with 217 D-Index or more. The highlighted bar, 114–115 D-Index, is where this scientist sits. 70–71 D-Index: 226 scientists 72–73 D-Index: 391 scientists 74–75 D-Index: 574 scientists 76–77 D-Index: 730 scientists 78–79 D-Index: 891 scientists 80–81 D-Index: 972 scientists 82–83 D-Index: 1,027 scientists 84–85 D-Index: 1,003 scientists 86–87 D-Index: 960 scientists 88–89 D-Index: 970 scientists 90–91 D-Index: 922 scientists 92–93 D-Index: 839 scientists 94–95 D-Index: 808 scientists 96–97 D-Index: 779 scientists 98–99 D-Index: 668 scientists 100–101 D-Index: 611 scientists 102–103 D-Index: 630 scientists 104–105 D-Index: 513 scientists 106–107 D-Index: 541 scientists 108–109 D-Index: 445 scientists 110–111 D-Index: 429 scientists 112–113 D-Index: 399 scientists 114–115 D-Index: 393 scientists 116–117 D-Index: 318 scientists 118–119 D-Index: 302 scientists 120–121 D-Index: 287 scientists 122–123 D-Index: 255 scientists 124–125 D-Index: 256 scientists 126–127 D-Index: 252 scientists 128–129 D-Index: 230 scientists 130–131 D-Index: 179 scientists 132–133 D-Index: 168 scientists 134–135 D-Index: 163 scientists 136–137 D-Index: 159 scientists 138–139 D-Index: 134 scientists 140–141 D-Index: 134 scientists 142–143 D-Index: 118 scientists 144–145 D-Index: 109 scientists 146–147 D-Index: 106 scientists 148–149 D-Index: 74 scientists 150–151 D-Index: 79 scientists 152–153 D-Index: 80 scientists 154–155 D-Index: 87 scientists 156–157 D-Index: 57 scientists 158–159 D-Index: 74 scientists 160–161 D-Index: 69 scientists 162–163 D-Index: 60 scientists 164–165 D-Index: 53 scientists 166–167 D-Index: 39 scientists 168–169 D-Index: 42 scientists 170–171 D-Index: 32 scientists 172–173 D-Index: 39 scientists 174–175 D-Index: 40 scientists 176–177 D-Index: 28 scientists 178–179 D-Index: 19 scientists 180–181 D-Index: 23 scientists 182–183 D-Index: 31 scientists 184–185 D-Index: 18 scientists 186–187 D-Index: 20 scientists 188–189 D-Index: 22 scientists 190–191 D-Index: 13 scientists 192–193 D-Index: 21 scientists 194–195 D-Index: 12 scientists 196–197 D-Index: 12 scientists 198–199 D-Index: 14 scientists 200–201 D-Index: 15 scientists 202–203 D-Index: 13 scientists 204–205 D-Index: 10 scientists 206–207 D-Index: 8 scientists 208–209 D-Index: 4 scientists 210–211 D-Index: 12 scientists 212–213 D-Index: 11 scientists 214–215 D-Index: 10 scientists 216 D-Index: 4 scientists 217+ D-Index: 98 scientists
70–71 D-Index 217+

This scientist: 115 D-Index — 78th percentile

78% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 217 D-Index or more.

View D-Index distribution as a table
Number of Medicine scientists by D-index, Research.com 2026 ranking edition. Based on 20,134 ranked scientists.
D-Index Scientists This scientist
70–71 226
72–73 391
74–75 574
76–77 730
78–79 891
80–81 972
82–83 1,027
84–85 1,003
86–87 960
88–89 970
90–91 922
92–93 839
94–95 808
96–97 779
98–99 668
100–101 611
102–103 630
104–105 513
106–107 541
108–109 445
110–111 429
112–113 399
114–115 393 115
116–117 318
118–119 302
120–121 287
122–123 255
124–125 256
126–127 252
128–129 230
130–131 179
132–133 168
134–135 163
136–137 159
138–139 134
140–141 134
142–143 118
144–145 109
146–147 106
148–149 74
150–151 79
152–153 80
154–155 87
156–157 57
158–159 74
160–161 69
162–163 60
164–165 53
166–167 39
168–169 42
170–171 32
172–173 39
174–175 40
176–177 28
178–179 19
180–181 23
182–183 31
184–185 18
186–187 20
188–189 22
190–191 13
192–193 21
194–195 12
196–197 12
198–199 14
200–201 15
202–203 13
204–205 10
206–207 8
208–209 4
210–211 12
212–213 11
214–215 10
216 4
217+ 98
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Overview

J. Alfred Witjes is affiliated with Radboud University in the Netherlands, focusing mainly on Medicine with a significant emphasis on Surgery, Oncology, Pulmonary and Respiratory Medicine, and Urology. Their scientific output includes extensive research related to bladder and urothelial cancer treatments, urinary and genital oncology studies, as well as cancer immunotherapy and biomarkers.

Their recent publications showcase a focus on muscle-invasive and metastatic bladder cancer, with notable papers including:

  • European Association of Urology Guidelines on Muscle-invasive and Metastatic Bladder Cancer: Summary of the 2020 Guidelines (2020, European Urology)
  • European Association of Urology Guidelines on Muscle-invasive and Metastatic Bladder Cancer: Summary of the 2023 Guidelines (2023, European Urology)

Collaborations are a significant aspect of their work. Frequent co-authors include Katja K.H. Aben, Lambertus A. Kiemeney, Richard P. Meijer, Antoine G. van der Heijden, and Shahrokh F. Shariat, highlighting a broad network of researchers contributing to their studies in urological oncology.

Main publication venues where their work appears frequently are:

  • European Urology
  • Journal of Clinical Oncology
  • European Urology Oncology
  • British Journal of Urology
  • The Journal of Urology

The core topics of their research contributions cover:

  • Bladder and Urothelial Cancer Treatments
  • Urinary and Genital Oncology Studies
  • Urological Disorders and Treatments
  • Cancer Immunotherapy and Biomarkers
  • Prostate Cancer Diagnosis and Treatment
  • Esophageal Cancer Research and Treatment
  • Prostate Cancer Treatment and Research

Among their prominent scientific output, several papers have drawn significant attention within the oncology community. These include their comprehensive guidelines for the European Association of Urology on bladder cancer as well as collaborative works published in high-impact journals such as European Urology, New England Journal of Medicine, and The Lancet. Their publications have been cited extensively, demonstrating engagement with their research at an international level.

Witjes' expertise centers on translating clinical guidelines and research findings into treatment protocols for muscle-invasive bladder cancer and related urological cancers. Their research emphasizes both diagnostic and therapeutic strategies within this field, contributing to the broader understanding of cancer immunotherapy and biomarkers in urological oncology.

Best Publications

  • Predicting recurrence and progression in individual patients with stage Ta T1 bladder cancer using EORTC risk tables: a combined analysis of 2596 patients from seven EORTC trials.

    Richard J. Sylvester;Adrian P.M. van der Meijden;Willem Oosterlinck;J. Alfred Witjes

  • Updated 2016 EAU Guidelines on Muscle-invasive and Metastatic Bladder Cancer

    J. Alfred Witjes;Thierry Lebret;Eva M. Compérat;Nigel C. Cowan

  • Erratum: Genetic variation in the prostate stem cell antigen gene PSCA confers susceptibility to urinary bladder cancer (Nature Genetics (2009) 41 (991-995))

    Xifeng Wu;Yuanqing Ye;Lambertus A. Kiemeney;Patrick Sulem

  • EAU Guidelines on Muscle-invasive and Metastatic Bladder Cancer: Summary of the 2013 Guidelines

    J. Alfred Witjes;Eva Compérat;Nigel C. Cowan;Maria De Santis

  • Genome-wide association study identifies a second prostate cancer susceptibility variant at 8q24.

    Julius Gudmundsson;Patrick Sulem;Andrei Manolescu;Laufey T Amundadottir

  • DD3PCA3-based Molecular Urine Analysis for the Diagnosis of Prostate Cancer

    Daphne Hessels;Jacqueline M.T. Klein Gunnewiek;Inge van Oort;Herbert F.M. Karthaus

  • Variability in the Recurrence Rate at First Follow-up Cystoscopy after TUR in Stage Ta T1 Transitional Cell Carcinoma of the Bladder: A Combined Analysis of Seven EORTC Studies

    Maurizio Brausi;Laurence Collette;Karlheinz Kurth;Adrian P. van der Meijden

  • Recurrence and progression of disease in non-muscle-invasive bladder cancer: from epidemiology to treatment strategy.

    Bas W.G. van Rhijn;Maximilian Burger;Yair Lotan;Eduardo Solsona

  • An individual patient data meta-analysis of the long-term outcome of randomised studies comparing intravesical mitomycin C versus Bacillus Calmette-Guerin for non-muscle-invasive bladder cancer

    Per-Uno Malmström;Richard J. Sylvester;David E. Crawford;Martin Friedrich

  • Prostate Cancer: Multiparametric MR Imaging for Detection, Localization, and Staging

    Caroline M A Hoeks;Jelle O Barentsz;Thomas Hambrock;Derya Yakar

  • Many sequence variants affecting diversity of adult human height

    Daniel F Gudbjartsson;G Bragi Walters;Gudmar Thorleifsson;Hreinn Stefansson

  • Relationship between Apparent Diffusion Coefficients at 3.0-T MR Imaging and Gleason Grade in Peripheral Zone Prostate Cancer

    Thomas Hambrock;Diederik M. Somford;Henkjan J. Huisman;Inge M. van Oort

  • Prostate Cancer Localization with Dynamic Contrast-enhanced MR Imaging and Proton MR Spectroscopic Imaging

    Jurgen J. Fütterer;Stijn W. T. P. J. Heijmink;Tom W. J. Scheenen;Jeroen Veltman

  • The Updated EAU Guidelines on Muscle-Invasive and Metastatic Bladder Cancer

    Arnulf Stenzl;Nigel C. Cowan;Maria De Santis;Gerhard Jakse

  • Accuracy of Magnetic Resonance Imaging for Local Staging of Prostate Cancer: A Diagnostic Meta-analysis

    Maarten de Rooij;Esther H.J. Hamoen;J. Alfred Witjes;Jelle O. Barentsz

  • Adjuvant Nivolumab versus Placebo in Muscle-Invasive Urothelial Carcinoma.

    Dean F Bajorin;J Alfred Witjes;Jürgen E Gschwend;Michael Schenker

  • Treatment of muscle-invasive and metastatic bladder cancer: Update of the EAU guidelines

    Arnulf Stenzl;Nigel C. Cowan;Maria De Santis;Markus A. Kuczyk

  • Seven year update of an EORTC phase III trial of high-dose intensity M-VAC chemotherapy and G-CSF versus classic M-VAC in advanced urothelial tract tumours.

    C.N. Sternberg;P.H.M. de Mulder;J.H. Schornagel;C. Theodore

  • Multiparametric Magnetic Resonance Imaging for Bladder Cancer: Development of VI-RADS (Vesical Imaging-Reporting And Data System).

    Valeria Panebianco;Yoshifumi Narumi;Ersan Altun;Bernard H. Bochner

Frequent Co-Authors

Lambertus A. Kiemeney
Lambertus A. Kiemeney Radboud University
Jelle O. Barentsz
Jelle O. Barentsz Radboud University
Jack A. Schalken
Jack A. Schalken Radboud University
Arnulf Stenzl
Arnulf Stenzl University of Tübingen
Mark S. Soloway
Mark S. Soloway Memorial Hospital of South Bend
Kari Stefansson
Kari Stefansson deCODE Genetics (Iceland)
Dorine W. Swinkels
Dorine W. Swinkels Radboud University
Peter F.A. Mulders
Peter F.A. Mulders Radboud University
Richard Sylvester
Richard Sylvester European Organisation for Research and Treatment of Cancer
Unnur Thorsteinsdottir
Unnur Thorsteinsdottir deCODE Genetics (Iceland)

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