Om P Sharma (Late) MD FRCP Master FCCPFormer Professor of Medicine, Keck School of Medicine, University of Southern California, Los Angeles, USAVioleta Mihailovic-Vucinic MD PhDProfessor of Internal Medicine and Pulmonology, Medical Faculty, University of Belgrade; Head of Department of Sarcoidosis and Other Granulomatous Diseases, Clinic of Pulmonology, Clinical Centre Belgrade, Serbia