Original sentence: He has helped to develop the careers of over 60 young physicians and scientists, many of whom are now professors and chairpersons in Europe, the United States, Australia and Latin America,  and  directed several training programs for physicians for many years,.He taught at the University of Ioannina  Medical School, Greece, for 10 years (1980-1990)   and  was the first General Director of the Foundation of Biomedical Research of the Academy of Athens (2001-2002)
Edited sentence: He has helped to develop the careers of over 60 young physicians and scientists, many of whom are now professors and chairpersons in Europe, the United States, Australia and Latin America,  and  directed several training programs for physicians for many years.He taught at the University of Ioannina  Medical School, Greece for 10 years (1980-1990)   and  was the first General Director of the Foundation of Biomedical Research of the Academy of Athens (2001-2002)