Citation Rankings
Highly Cited Researchers
Highly Cited Researchers 49 Scientists Citation 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.
* Total Citation Counts Rankings
Ranking Based On Selection: 1
Neuropsychiatry and Neuropharmacology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,172
2,071
0.953
* Total Citation Counts Rankings
Ranking Based On Selection: 2
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,867
723
0.387
* Total Citation Counts Rankings
Ranking Based On Selection: 3
Gastroenterology and Hepatology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
624
134
0.215
* Total Citation Counts Rankings
Ranking Based On Selection: 4
PD/Pain/Neuroendoc/Neurostress/neurotox
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
537
534
0.994
* Total Citation Counts Rankings
Ranking Based On Selection: 5
Community Health intervention - NCDs
Adolescent Reproductive Health
Infection prevention & control
Nursing Research & Educati
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
522
434
0.831
* Total Citation Counts Rankings
Ranking Based On Selection: 6
Cardiovascular Physiology
Endothelia cell physiology
Respiratory physiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
394
391
0.992
* Total Citation Counts Rankings
Ranking Based On Selection: 7
Endocrinology/Reproduction
Blood
Exercise Physiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
342
291
0.851
* Total Citation Counts Rankings
Ranking Based On Selection: 8
PARASITOLOGY
MICROBIOLOGY AND PUBLIC HEALTH
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
317
227
0.716
* Total Citation Counts Rankings
Ranking Based On Selection: 9
Gastrointestinal Physiology
Neuro-Physiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
269
189
0.703
* Total Citation Counts Rankings
Ranking Based On Selection: 10
CHEMICAL PATHOLOGY
LABORATORY ANDROLOGY
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
223
219
0.982
* Total Citation Counts Rankings
Ranking Based On Selection: 11
Membràne and Medical Biochemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
222
118
0.532
* Total Citation Counts Rankings
Ranking Based On Selection: 12
Environmental toxicology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
195
180
0.923
* Total Citation Counts Rankings
Ranking Based On Selection: 13
Neglected Tropical Diseases
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
162
155
0.957
* Total Citation Counts Rankings
Ranking Based On Selection: 14
Neuroendocrine Pharmacology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
146
144
0.986
* Total Citation Counts Rankings
Ranking Based On Selection: 15
toxicology
pharmacology
endocrinology and chemical pathology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
136
103
0.757
* Total Citation Counts Rankings
Ranking Based On Selection: 16
Neuroscience Toxicology Forensic Anatomy Diabetes Studies Developmental Biology Genetics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
114
60
0.526
* Total Citation Counts Rankings
Ranking Based On Selection: 17
Medical and Pharmacological Biochemistry
Endocrinology
Toxicology
Ethnomedicine
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
113
85
0.752
* Total Citation Counts Rankings
Ranking Based On Selection: 18
Cancer Research
Chemotherapy
Cancer Epigenetics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
99
99
1.000
* Total Citation Counts Rankings
Ranking Based On Selection: 19
Reproductive Health
Gynaecological Oncology
Urogynaecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
97
39
0.402
* Total Citation Counts Rankings
Ranking Based On Selection: 20
Sequential extration method
bioaccessibility
mineralogy
trace elements
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
94
89
0.947
* Total Citation Counts Rankings
Ranking Based On Selection: 21
Nutritional Biochemistry/Toxicology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
91
55
0.604
* Total Citation Counts Rankings
Ranking Based On Selection: 22
Medical & Clinical Biochemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
80
80
1.000
* Total Citation Counts Rankings
Ranking Based On Selection: 23
Environmental physiology
Exercise physiology
Neuroscience
Reproductive physiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
69
69
1.000
* Total Citation Counts Rankings
Ranking Based On Selection: 24
Public Health
Medicine/medical sciences
Environmental
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
68
46
0.676
* Total Citation Counts Rankings
Ranking Based On Selection: 25
Exercise and cardiovascular physiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
61
61
1.000
* Total Citation Counts Rankings
Rankings
422,748
705
1
Ranking Based On Selection: 1
Benneth Ben-Azu
PAMO University of Medical Sciences
Port-Harcourt, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,172
2,071
0.953
Neuropsychiatry and Neuropharmacology
* Total Citation Counts Rankings
Rankings
470,973
918
2
Ranking Based On Selection: 2
Ngozi Nma Odu
PAMO University of Medical Sciences
Port-Harcourt, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,867
723
0.387
* Total Citation Counts Rankings
Rankings
852,769
4,807
3
Ranking Based On Selection: 3
Anele Ihekwaba
PAMO University of Medical Sciences
Port-Harcourt, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
624
134
0.215
Gastroenterology and Hepatology
* Total Citation Counts Rankings
Rankings
902,788
5,745
4
Ranking Based On Selection: 4
Olusegun Gafar Adebayo
PAMO University of Medical Sciences
Port-Harcourt, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
537
534
0.994
* Total Citation Counts Rankings
Rankings
913,768
5,943
5
Ranking Based On Selection: 5
Eunice Osuala
PAMO University of Medical Sciences
Port-Harcourt, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
522
434
0.831
Community Health intervention - NCDs
Adolescent Reproductive Health
Infection prevention & control
Nursing Research & Educati
* Total Citation Counts Rankings
Rankings
1,028,936
8,122
6
Ranking Based On Selection: 6
Asiwe Jerome Ndudi
PAMO University of Medical Sciences
Port-Harcourt, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
394
391
0.992
Cardiovascular Physiology
Endothelia cell physiology
Respiratory physiology
* Total Citation Counts Rankings
Rankings
1,086,204
9,290
7
Ranking Based On Selection: 7
Tolunigba Abisola Kolawole
PAMO University of Medical Sciences
Port-Harcourt, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
342
291
0.851
Endocrinology/Reproduction
Blood
Exercise Physiology
* Total Citation Counts Rankings
Rankings
1,117,930
9,906
8
Ranking Based On Selection: 8
Clement Nyenke
PAMO University of Medical Sciences
Port-Harcourt, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
317
227
0.716
PARASITOLOGY
MICROBIOLOGY AND PUBLIC HEALTH
* Total Citation Counts Rankings
Rankings
1,187,209
11,366
9
Ranking Based On Selection: 9
Elizabeth Bassey Umoren
PAMO University of Medical Sciences
Port-Harcourt, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
269
189
0.703
Gastrointestinal Physiology
Neuro-Physiology
* Total Citation Counts Rankings
Rankings
1,266,631
13,075
10
Ranking Based On Selection: 10
Fyneface Chikadibia Amadi
PAMO University of Medical Sciences
Port-Harcourt, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
223
219
0.982
CHEMICAL PATHOLOGY
LABORATORY ANDROLOGY
* Total Citation Counts Rankings
Rankings
1,269,818
13,147
11
Ranking Based On Selection: 11
Okon Etim
PAMO University of Medical Sciences
Port-Harcourt, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
222
118
0.532
Membràne and Medical Biochemistry
* Total Citation Counts Rankings
Rankings
1,324,538
14,299
12
Ranking Based On Selection: 12
Emmanuel Modo
PAMO University of Medical Sciences
Port-Harcourt, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
195
180
0.923
* Total Citation Counts Rankings
Rankings
1,404,950
16,145
13
Ranking Based On Selection: 13
Onosakponome E|ONOSAKPONOME EVELYN OREVAOGHENE, E.O. ONOSAKPONDME
PAMO University of Medical Sciences
Port-Harcourt, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
162
155
0.957
Neglected Tropical Diseases
* Total Citation Counts Rankings
Rankings
1,449,340
17,185
14
Ranking Based On Selection: 14
Ajirioghene Akpotu
PAMO University of Medical Sciences
Port-Harcourt, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
146
144
0.986
Neuroendocrine Pharmacology
* Total Citation Counts Rankings
Rankings
1,480,652
17,956
15
Ranking Based On Selection: 15
Okolonkwo Benjamin Nnamdi
PAMO University of Medical Sciences
Port-Harcourt, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
136
103
0.757
toxicology
pharmacology
endocrinology and chemical pathology
* Total Citation Counts Rankings
Rankings
1,554,788
19,734
16
Ranking Based On Selection: 16
Helen Bassey Akpan
PAMO University of Medical Sciences
Port-Harcourt, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
114
60
0.526
Neuroscience Toxicology Forensic Anatomy Diabetes Studies Developmental Biology Genetics
* Total Citation Counts Rankings
Rankings
1,557,672
19,795
17
Ranking Based On Selection: 17
Utibe Evans Bassey
PAMO University of Medical Sciences
Port-Harcourt, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
113
85
0.752
Medical and Pharmacological Biochemistry
Endocrinology
Toxicology
Ethnomedicine
* Total Citation Counts Rankings
Rankings
1,609,013
21,074
18
Ranking Based On Selection: 18
Bubaraye Uko
PAMO University of Medical Sciences
Port-Harcourt, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
99
99
1.000
Cancer Research
Chemotherapy
Cancer Epigenetics
* Total Citation Counts Rankings
Rankings
1,620,115
21,399
19
Ranking Based On Selection: 19
Nestor Mininyo Inimgba
PAMO University of Medical Sciences
Port-Harcourt, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
97
39
0.402
Reproductive Health
Gynaecological Oncology
Urogynaecology
* Total Citation Counts Rankings
Rankings
1,630,047
21,635
20
Ranking Based On Selection: 20
Patrick M. Amaibi
PAMO University of Medical Sciences
Port-Harcourt, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
94
89
0.947
Sequential extration method
bioaccessibility
mineralogy
trace elements
* Total Citation Counts Rankings
Rankings
1,644,444
22,049
21
Ranking Based On Selection: 21
Ekam Akpakpan|Ekam Ime Akpakpan
PAMO University of Medical Sciences
Port-Harcourt, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
91
55
0.604
Nutritional Biochemistry/Toxicology
* Total Citation Counts Rankings
Rankings
1,690,011
23,217
22
Ranking Based On Selection: 22
Anthony Chibuzor Nnamudi
PAMO University of Medical Sciences
Port-Harcourt, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
80
80
1.000
Medical & Clinical Biochemistry
* Total Citation Counts Rankings
Rankings
1,742,443
24,655
23
Ranking Based On Selection: 23
Rejoice Buduburisi
PAMO University of Medical Sciences
Port-Harcourt, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
69
69
1.000
Environmental physiology
Exercise physiology
Neuroscience
Reproductive physiology
* Total Citation Counts Rankings
Rankings
1,750,637
24,907
24
Ranking Based On Selection: 24
Nnenna Ihua
PAMO University of Medical Sciences
Port-Harcourt, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
68
46
0.676
Public Health
Medicine/medical sciences
Environmental
* Total Citation Counts Rankings
Rankings
1,784,590
25,832
25
Ranking Based On Selection: 25
Idara Asuquo Okon
PAMO University of Medical Sciences
Port-Harcourt, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
61
61
1.000