Philadelphia — Two Penn Dental Medicine faculty members — Dr. George Hajishengallis, Thomas W. Evans Centennial Professor in the Department of Basic & Translational Sciences, and Dr. Michel Koo, Professor in the Department of Orthodontics and Divisions of Community Oral Health and Pediatric Dentistry, have been once again recognized for the scope and depth of their research — named on the Highly Cited Researchers™ 2024 list from Clarivate.

The annual list identifies researchers who demonstrated significant influence in their chosen field or fields through the publication of multiple highly cited papers during the last decade. These papers rank in the top 1% by citations for field or fields and publication year in the Web of Science™ citation index. In 2024, 6,636 individuals earned the Highly Cited Researcher distinction — of the world’s population of scientists and social scientists, they are 1 in 1,000.

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