In 1990, Lin went to the US to learn how to collect and use cord blood. After returning to Taiwan, starting in 1995 he gathered cord blood from relatives, mainly siblings, to treat more than 30 serious cases of childhood leukemia and neuroblastoma. But there were only five instances among them in which the white blood cell antigens were a match, meeting the criteria for cord blood transplant.
1990 年林凱信赴美國學習臍帶血的收集和運用，回國後，自 1995 年起，他曾為三十幾例嚴重白血病、神經母細胞瘤病童，收集親屬（以兄弟姊妹為主）的臍帶血，但其中只有 5 例的白血球抗原比對吻合，有做臍帶血移植的條件。