James J. Maguire Jr. Professor of Spine Research, Thomas Jefferson University

Duke University

Professor in Dentistry, Università degli Studi di Milano

William Harvey Research Institute, Barts and the London School of Medicine

Associate Professor, University of Michigan

INSERM (PARCC Paris V) and UCSF/VA Hospital SF

Professor & Chief Surgeon, Tampere University, Finland

Kyung Hee University

Pukyong National University, Busan, Republic of Korea (ex- Chosun Univ.)

University of Chicago