Citation Rankings
Highly Cited Researchers

Medical and Health Sciences Highly Cited Researchers 427 Scientists Citation in Canada Rankings - 2025

The Citation Rankings (Highly Cited Researchers) list highlight the most cited and influential researchers across a vast range of scientific fields, covering 197 main and sub-disciplines, including the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings. This service, offered exclusively by AD Scientific Index, aims to provide a balanced perspective by excluding data from CERN and other statistical sources that disproportionately favor certain researchers, particularly in the social sciences and humanities. This unique approach addresses the advantages researchers with multi-author publications and CERN involvement hold over others. Furthermore, citation rankings help uncover rule violations and unethical practices within the research community. For more detailed citation analyses, explore the Scientists Last 6 Years Citation Index, Universities Total Citations Rankings 2025, and Universities Last 6 Years Citations Rankings 2025.

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Total 427 scientists
* Total Citation Counts Rankings
Ranking Based On Selection: 1
Canada
Gordon Guyatt
Evidence-based medicine
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
603,120
261,256
0.433
* Total Citation Counts Rankings
Ranking Based On Selection: 2
Canada
Peter Tugwell
Equity
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
391,826
185,875
0.474
* Total Citation Counts Rankings
Ranking Based On Selection: 3
Canada
Holger Schünemann
GRADE
Recommendations
Knowledge Synthesis
Systematic Reviews
Guidelines
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
349,787
190,904
0.546
* Total Citation Counts Rankings
Ranking Based On Selection: 4
Canada
Zahid Ahmad Butt
Epidemiology
Public Health
Global Health
Syndemics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
148,419
125,689
0.847
* Total Citation Counts Rankings
Ranking Based On Selection: 5
Canada
R Brian Haynes
clinical epidemiology
evidence-based knowledge translation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
136,641
22,972
0.168
* Total Citation Counts Rankings
Ranking Based On Selection: 6
Canada
Robby Nieuwlaat
Clinical Epidemiology
Guidelines
Systematic Reviews
Knowledge Translation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
108,995
41,217
0.378
* Total Citation Counts Rankings
Ranking Based On Selection: 7
Canada
Ian Janssen
physical activity
sedentary behavior
children
epidemiology
public health
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
89,550
34,702
0.388
* Total Citation Counts Rankings
Ranking Based On Selection: 8
Canada
Vijay Kumar Chattu
Public Health
Health Diplomacy
Occupational Medicine
International Relations
Global Governance
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
81,375
74,659
0.917
* Total Citation Counts Rankings
Ranking Based On Selection: 9
Canada
Amit X. Garg
Kidney diseases
Kidney Donation
Clinical research
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
79,183
33,661
0.425
* Total Citation Counts Rankings
Ranking Based On Selection: 10
Canada
Geoffrey Norman
Cognitive science
education
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
78,368
17,384
0.222
* Total Citation Counts Rankings
Ranking Based On Selection: 11
Canada
Saverio Stranges
Epidemiology & Public Health
Cardiovascular and Diabetes Research
Nutrition and Lifestyles
Global Health
Aging Epidemiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
73,025
48,609
0.666
* Total Citation Counts Rankings
Ranking Based On Selection: 12
Canada
Madhukar Pai
Tuberculosis
Global Health
Public Health
Infectious Diseases
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
62,130
21,310
0.343
* Total Citation Counts Rankings
Ranking Based On Selection: 13
Canada
Ian Shrier
epidemiology
sport medicine
injury
evidence synthesis
causal inference
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
59,730
41,285
0.691
* Total Citation Counts Rankings
Ranking Based On Selection: 14
Canada
Tinuke O Olagunju
Public Health
Epidemiology
Population Health
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
59,606
52,142
0.875
* Total Citation Counts Rankings
Ranking Based On Selection: 15
Canada
Julian Little
epidemiology
genetics
cancer
congenital anomalies
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
56,552
24,209
0.428
* Total Citation Counts Rankings
Ranking Based On Selection: 16
Canada
Malcolm Sears
asthma
allergy
epidemiology
respiratory diseases
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
54,474
17,339
0.318
* Total Citation Counts Rankings
Ranking Based On Selection: 17
Canada
Jeffrey A Johnson
Diabetes
health services and policy research
epidemiology
public health
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
53,667
17,925
0.334
* Total Citation Counts Rankings
Ranking Based On Selection: 18
Canada
Eduardo L Franco
epidemiology
cancer prevention
human papillomavirus infection
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
53,622
11,387
0.212
* Total Citation Counts Rankings
Ranking Based On Selection: 19
Canada
Prabhat Jha
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
48,622
16,147
0.332
* Total Citation Counts Rankings
Ranking Based On Selection: 20
Canada
John R Mclaughlin
epidemiology
public health
disease prevention
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
46,936
12,252
0.261
* Total Citation Counts Rankings
Ranking Based On Selection: 21
Canada
Herman W Barkema
epidemiology
dairy
one health
antimicrobial resistance
mastitis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
41,811
18,287
0.437
* Total Citation Counts Rankings
Ranking Based On Selection: 22
Canada
M Joffres
Epidemiology
Public Health
Prevention
Hypertension
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
39,409
21,453
0.544
* Total Citation Counts Rankings
Ranking Based On Selection: 23
Canada
Gillian Booth
diabetes epidemiology
health services research
public health policy
built environment
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
38,789
10,726
0.277
* Total Citation Counts Rankings
Ranking Based On Selection: 24
Canada
Jay S Kaufman
Epidemiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
37,047
15,177
0.410
* Total Citation Counts Rankings
Ranking Based On Selection: 25
Canada
Teresa To
Epidemiology
asthma
chronic respiratory diseases
outcomes research
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
36,470
14,218
0.390
* Total Citation Counts Rankings
Rankings
10
Canada
3
1
Ranking Based On Selection: 1
Gordon Guyatt
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
603,120
261,256
0.433
* Total Citation Counts Rankings
Rankings
79
Canada
7
1
Ranking Based On Selection: 2
Peter Tugwell
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
391,826
185,875
0.474
* Total Citation Counts Rankings
Rankings
135
Canada
12
4
Ranking Based On Selection: 3
Holger Schünemann
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
349,787
190,904
0.546
GRADE
Recommendations
Knowledge Synthesis
Systematic Reviews
Guidelines
* Total Citation Counts Rankings
Rankings
1,501
Canada
61
1
Ranking Based On Selection: 4
Zahid Ahmad Butt
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
148,419
125,689
0.847
* Total Citation Counts Rankings
Rankings
1,763
Canada
72
15
Ranking Based On Selection: 5
R Brian Haynes
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
136,641
22,972
0.168
* Total Citation Counts Rankings
Rankings
2,725
Canada
105
20
Ranking Based On Selection: 6
Robby Nieuwlaat
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
108,995
41,217
0.378
Clinical Epidemiology
Guidelines
Systematic Reviews
Knowledge Translation
* Total Citation Counts Rankings
Rankings
3,961
Canada
153
2
Ranking Based On Selection: 7
Ian Janssen
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
89,550
34,702
0.388
physical activity
sedentary behavior
children
epidemiology
public health
* Total Citation Counts Rankings
Rankings
4,655
Canada
179
31
Ranking Based On Selection: 8
Vijay Kumar Chattu
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
81,375
74,659
0.917
Public Health
Health Diplomacy
Occupational Medicine
International Relations
Global Governance
* Total Citation Counts Rankings
Rankings
4,894
Canada
191
3
Ranking Based On Selection: 9
Amit X. Garg
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
79,183
33,661
0.425
* Total Citation Counts Rankings
Rankings
4,988
Canada
195
30
Ranking Based On Selection: 10
Geoffrey Norman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
78,368
17,384
0.222
* Total Citation Counts Rankings
Rankings
5,563
Canada
217
6
Ranking Based On Selection: 11
Saverio Stranges
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
73,025
48,609
0.666
Epidemiology & Public Health
Cardiovascular and Diabetes Research
Nutrition and Lifestyles
Global Health
Aging Epidemiology
* Total Citation Counts Rankings
Rankings
7,247
Canada
272
20
Ranking Based On Selection: 12
Madhukar Pai
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
62,130
21,310
0.343
Tuberculosis
Global Health
Public Health
Infectious Diseases
* Total Citation Counts Rankings
Rankings
7,716
Canada
292
23
Ranking Based On Selection: 13
Ian Shrier
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
59,730
41,285
0.691
epidemiology
sport medicine
injury
evidence synthesis
causal inference
* Total Citation Counts Rankings
Rankings
7,742
Canada
293
41
Ranking Based On Selection: 14
Tinuke O Olagunju
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
59,606
52,142
0.875
* Total Citation Counts Rankings
Rankings
8,453
Canada
321
11
Ranking Based On Selection: 15
Julian Little
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
56,552
24,209
0.428
* Total Citation Counts Rankings
Rankings
8,979
Canada
345
46
Ranking Based On Selection: 16
Malcolm Sears
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
54,474
17,339
0.318
* Total Citation Counts Rankings
Rankings
9,183
Canada
358
27
Ranking Based On Selection: 17
Jeffrey A Johnson
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
53,667
17,925
0.334
Diabetes
health services and policy research
epidemiology
public health
* Total Citation Counts Rankings
Rankings
9,194
Canada
359
28
Ranking Based On Selection: 18
Eduardo L Franco
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
53,622
11,387
0.212
epidemiology
cancer prevention
human papillomavirus infection
* Total Citation Counts Rankings
Rankings
10,715
Canada
422
66
Ranking Based On Selection: 19
Prabhat Jha
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
48,622
16,147
0.332
* Total Citation Counts Rankings
Rankings
11,314
Canada
444
71
Ranking Based On Selection: 20
John R Mclaughlin
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
46,936
12,252
0.261
* Total Citation Counts Rankings
Rankings
13,648
Canada
538
26
Ranking Based On Selection: 21
Herman W Barkema
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
41,811
18,287
0.437
epidemiology
dairy
one health
antimicrobial resistance
mastitis
* Total Citation Counts Rankings
Rankings
15,033
Canada
601
11
Ranking Based On Selection: 22
M Joffres
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
39,409
21,453
0.544
* Total Citation Counts Rankings
Rankings
15,400
Canada
620
105
Ranking Based On Selection: 23
Gillian Booth
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
38,789
10,726
0.277
diabetes epidemiology
health services research
public health policy
built environment
* Total Citation Counts Rankings
Rankings
16,563
Canada
675
57
Ranking Based On Selection: 24
Jay S Kaufman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
37,047
15,177
0.410
* Total Citation Counts Rankings
Rankings
16,962
Canada
702
13
Ranking Based On Selection: 25
Teresa To
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
36,470
14,218
0.390
Epidemiology
asthma
chronic respiratory diseases
outcomes research