Nguyễn , T. H., Nguyễn , T. M. H. and Nguyễn , Q. H. (2026) “A PRELIMINARY SURVEY OF BARRIERS FACED BY CARDIOLOGISTS IN THE DIAGNOSIS AND MANAGEMENT OF HEART FAILURE WITH PRESERVED EJECTION FRACTION IN OLDER ADULTS”, Vietnam Medical Journal, 561(1). doi: 10.51298/vmj.v561i1.18125.