​Ralph J. Lellé has trained as a gynecologist at Hannover Medical School, Hannover, Germany. After a Fellowship in Gynecologic Oncology at the University of Michigan, Ann Arbor, he returned to Germany and became a Professor of Gynecologic Oncology in the Department of Gynecology, Muenster University, Germany. He is also a cytopathologist at the Gerhard Domagk Institute of Pathology of Muenster University and has been active in HPV-related cancer prevention and treatment for almost four decades. Ralph J. Lellé is an honorary member of the AG-CPC (German Society of Cervical Pathology and Colposcopy).Volkmar Küppers has worked as a gynecologist and obstetrician at Duesseldorf University, Germany. He also received training in gynecologic histopathology and cytopathology. He has been in private practice for many years and specializes in colposcopic diagnosis and treatment. Presently, Volkmar Küppers is the President of the AG-CPC (German Society of Cervical Pathology and Colposcopy).