Identifying the effective strategies in reducing the effects of mental health issues caused by COVID-19 pandemic in healthcare providers: a systematic review. - Derakhshani, Naser; Aghdam, Emir Tahmazi; Nafar, Hamideh; Tavakoli, Mohamad Esmaeel; Gladkova, Lubov; Pouyan, Seyedeh Narges; Joudyian, Nasrin (BMC Health Services Research, 2025)