Twelve years ago Chang treated a severely humpbacked woman in her 60s. Despite careful preparation, during surgery a vertebra was displaced (spondylolisthesis), leaving the woman paralyzed. Tragically, she also developed pneumonia, dying just a few weeks later.
12 年前他曾治療一位六十多歲嚴重駝背的病患，即使事前已做過所有檢查，手術中仍不幸發生脊椎切斷後脫位的現象，造成病患癱瘓，產生肺炎併發症，病患也在幾星期後死亡。