Citation Rankings (Highly Cited Researchers) 2024 and list of influential and most cited researchers in Agriculture and Forestry, Architecture and Design, 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)
![Seth Landefeld](/user/assets/images/profile/no-profile-photo.png)
health care research
geriatrics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
39,441
11,728
0.297
![Grant R Williams](https://cdn.adscientificindex.com/pictures/ca/1702450.jpg)
geriatric oncology
gastrointestinal oncology
geriatric assessment
sarcopenia
frailty
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,070
7,014
0.869
* Last 6 Years Citation Counts Rankings
![Christine C Ferguson](https://cdn.adscientificindex.com/pictures/b3/5682956.jpg)
gerontology
disability
nutrition
dietary patterns
neurology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
62
62
1.000
* Last 6 Years Citation Counts Rankings
![Cheryl Lee](https://cdn.adscientificindex.com/pictures/fe/5200582.jpg)
geriatrics
dementia
caregivers
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
39
39
1.000
Seth Landefeld
University of Alabama Birmingham
Birmingham, United States
![United States](/flags/us.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
39,441
11,728
0.297
health care research
geriatrics
Grant R Williams
University of Alabama Birmingham
Birmingham, United States
![United States](/flags/us.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,070
7,014
0.869
geriatric oncology
gastrointestinal oncology
geriatric assessment
sarcopenia
frailty
Christine C Ferguson
University of Alabama Birmingham
Birmingham, United States
![United States](/flags/us.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
62
62
1.000
gerontology
disability
nutrition
dietary patterns
neurology
Cheryl Lee
University of Alabama Birmingham
Birmingham, United States
![United States](/flags/us.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
39
39
1.000
geriatrics
dementia
caregivers