1 Dieter Scheffner Center for Medical Education and Educational Research, Dean's Office for Study Affairs, Charité - Universitätsmedizin Berlin, Berlin, Germany.
2 Medical Education Department, Alexandria Faculty of Medicine, Alexandria University, Alexandria, Egypt.
3 Office of Medical Education, Billings Clinic, Billings, Montana, USA.
4 Centre de Recherche du Centre Intégré Universitaire de Santé et Services Sociaux du Nord-de-l'Île-de-Montréal, Montréal, Canada.