“SURVEY OF PATIENT KNOWLEDGE REGARDING SAFETY WHEN USING EYE DROPS AND OINTMENTS AMONG OUTPATIENTS COVERED BY HEALTH INSURANCE AT CLINIC 2D NGUYEN VIET XUAN – HANOI EYE HOSPITAL ”. Vietnam Journal of Community Medicine 67, no. CĐ5-NCKH (May 4, 2026). Accessed September 8, 2026. https://tapchiyhcd.vn/index.php/yhcd/article/view/5023.