胃腸科研究權威、世界級胃病專家，現為台大醫院院長。熱愛歷史與武俠，熟讀《地藏菩薩本願經》，養成是非分明的俠義性格。透過研究來行俠仗「醫」，學術論著高達500多篇，著重在幽門螺旋桿菌和胃腸道癌症。接任台大醫院院長後立志發展精準醫療、智慧醫療，尖端醫療，為民眾健康努力。
為什麼有些人年紀輕輕沒有三高也會中風，卻也有人菸酒熬夜樣樣來卻不曾罹癌？你身邊一定也有些怎麼吃也吃不胖的朋友，或是號稱喝水也會胖的夥伴。每個人長期的健康狀況，皆是遺傳基因加上生活型態與環境因子互相綜合的結果。
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