1. Division of Gastroenterology and Hepatology, Department of Internal Medicine, Chi-Mei Medical Center, Liouying, Tainan, Taiwan.
2. Division of Gastroenterology and Hepatology, Sacramento VA Medical Center and UC Davis Medical Center, Sacramento, California, USA.
3. Medicine Library and Center for Knowledge Management, University of California, San Francisco, California, USA.
4. Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University, College of Medicine, Kaohsiung, Taiwan.
5. Department of Family Health Care Nursing, School of Nursing, University of California, San Francisco, San Francisco, California, USA.