Nguyễn, C. T. T. T.; Đoàn, K. T.; Nguyễn, P. D.; Nguyễn, T. X.; Trương, C. T. EVALUATION OF FRONTALIS MUSCLE FLAP ADVANCEMENT IN THE MANAGEMENT OF RECURRENT PTOSIS AFTER LEVATOR RESECTION OR SLING SUSPENSION. VMJ 2026, 557.