Simatupang, Nofi Reski Yani, Ermi Girsang, and Sri Lestari Ramadhani. 2026. “Evaluation of Referral System Barriers at Dr. Pirngadi Hospital, Medan City: Qualitative Study of In-Depth Interviews”. Proceedings International Conference on Lifestyle Diseases and Natural Medicine (ICOLIFEMED) 2 (1):235-40. https://jurnal.unprimdn.ac.id/index.php/icolifemed/article/view/7993.