Citation Rankings (Highly Cited Researchers) 2024 and list of influential and most cited researchers in Agriculture and Forestry, Art, Design and Architecture, Business and Management, Economics and Econometrics, Education, Engineering and Technology, History, Philosophy, Theology, Law, Medicine and Health Sciences, Natural Sciences and Social Sciences and their 256 sub-branches is a unique service offered only by “AD Scientific Index”. You can see the most cited and influential researchers in the country and region. See also for more specific citation analyses: "last 6 years citation index" Universities Rankings 2024 (Sort by: Total Citations) and Universities Rankings 2024 (Sort by : Last 6 Years Citations)
* Total Citation Counts Rankings
World Rank
205,897
Country Rank
73,954
Institution Rank : 87
![](https://cdn.adscientificindex.com/logos/5613.jpg)
![United States](/flags/us.png)
![Syed M Ahmed](https://cdn.adscientificindex.com/pictures/ba/1360097.jpg)
family medicine
community engagement
community engaged research
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,858
2,082
0.429
* Total Citation Counts Rankings
World Rank
466,437
Country Rank
147,474
Institution Rank : 165
![](https://cdn.adscientificindex.com/logos/5613.jpg)
![United States](/flags/us.png)
![Kenneth G Schellhase](https://cdn.adscientificindex.com/pictures/b6/1360074.jpg)
Population health
care for the underserved
health plan management
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,797
571
0.318
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
205,897
![United States](/flags/us.png)
73,954
![](https://cdn.adscientificindex.com/logos/5613.jpg)
87
Syed M Ahmed
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,858
2,082
0.429
![](https://cdn.adscientificindex.com/logos/5613.jpg)
family medicine
community engagement
community engaged research
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
466,437
![United States](/flags/us.png)
147,474
![](https://cdn.adscientificindex.com/logos/5613.jpg)
165
Kenneth G Schellhase
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,797
571
0.318
![](https://cdn.adscientificindex.com/logos/5613.jpg)
Population health
care for the underserved
health plan management