Medical students’ perception of paid E-learning - Parsa Mohri; Yilmaz Onat Koyluoglu; Mustafa Ege Seker; S‚ehla Nurefs‚an Sancak; Mirkan Dikeç; Ayça Aydemir Mazlumoglu; Yesim Gurol; Ilhan Cem Sungur (PLoS ONE, 2025)