EFFECT OF WORKING HOURS ON DEPRESSION AND MENTAL WELLBEING AMONG HEALTHCARE PROVIDERS OF OPERATION THEATER OF MULTIPLE TERTIARY CARE HOSPITALS OF KARACHI, PAKISTAN. FMHR [Internet]. 2026 May 21 [cited 2026 May 21];4(5):693-704. Available from: https://fmhr.net/index.php/fmhr/article/view/2920