“From Service Burden to Burnout: The Protective Role of Supervisory Support Among Internal Medicine Postgraduate Residents in Punjab Teaching Hospitals A Cross-Sectional Survey Running head: Service burden, supervisory support, and burnout in Punjab Intern”, Pjmcr, vol. 5, no. 2, pp. 6501–6517, Jun. 2026, doi: 10.66021/pakmcr1381.