In 2014, my wife took our seven week old son to Dr. Chang to investigate his worsening jaundice. His insight and prompt response, checking my son's direct biliruben count (our own physician did not opt to run this test earlier), admitting him that night to hospital to provide us access to immediate testing by a visiting pediatric gastroenterologist, saved days if not weeks of diagnosis, allowing the surgeons at CHOC to effectively treat his biliary atresia. Without the prompt action by Dr. Chang, we may not have been able to treat our son and would have been facing an urgent need for a liver transplant. For this, we are deeply, sincerely and forever grateful. Today our son is a healthy, vibrant, occasionally and wonderfully exasperating four-year-old boy and has not spent a day in a hospital since 2014.