Exploring the challenges and ethical requirements of medical sciences education during COVID-19: a qualitative study - Ramezani, Ghobad; Aalaa, Maryam; Zahedi, Farzaneh; Soltani Arabshahi, Seyed Kamran; Rasouli, Davood; Keshavarzi, Mohammad Hasan (Journal of Medical Ethics and History of Medicine, 2021)