Comparative Study of Occupational Burnout and Job Stress of Frontline and Non-Frontline Healthcare Workers in Hospital Wards during COVID-19 Pandemic - Etesam, Farnaz; Akhlaghi, Mitra; Vahabi, Zahra; Akbarpour, Samaneh; Sadeghian, Mohammad Hossein (Iranian Journal of Public Health, 2021)