Prevalence of depression and anxiety among myasthenia gravis (MG) patients: A systematic review and meta‐analysis oleh Javad Nadali, Neda Ghavampour, Farzaneh Beiranvand, Mona Maleki Takhtegahi, Mohammad Eghbal Heidari, Shahin Salarvand, Tina Arabzadeh, Omid Narimani Charan