Plastic surgeon Hung Kai-feng of Linkou Chang Gung Memorial Hospital, who has taken part in all four trips to Vietnam, says that the incidence of oral clefts there is as high as one in 500 births, which is significantly higher than the rate of one in 600 found in Taiwan in earlier years.
每一趟越南義診均親身參與的林口長庚醫院整形外科主治醫師洪凱風表示，越南唇顎裂的發生率約五百分之一，比台灣早年約六百分之一的發生率還要高出許多。