Yanli Nie Lin Li Yurong Duan Peixian Chen Bruce H Barraclough Mingming Zhang Jing Li

soheil peiman department of internal medicine, school of medicine, tehran university of medical sciences. tehran, iran. azim mirzazadeh department of internal medicine, imam khomeini hospital complex, tehran university of medical sciences, tehran, iran. and department of internal medicine, health professions education research center, tehran university of medical sciences, tehran, iran. and department of medical education, school of medicine, tehran university of medical sciences, tehran, iran. maryam alizadeh department of medical education, school of medicine, tehran university of medical sciences, tehran, iran. sara mortaz hejri department of medical education, health professions education research center, tehran university of medical sciences, tehran, iran. mohammad-taghi najafi department of nephrology, nephrology research center, tehran university of medical sciences, tehran, iran. abbas tafakhori department of neurology, imam khomeini hospital complex, tehran university of medical sciences, tehran, iran. and department of neurology, iranian center of neurological research, tehran university of medical sciences, tehran, iran.