Community Medicine Research Center and Institute of Public Health, National Yang-MingUniversity, Cheng Hsin General Hospital, Taipei, Taiwan, China;
Department of medicine, Veterans GeneralHospital, Taipei, Taiwan, China;
Cheng Hsin General Hospital, Faculty ofMedicine, School of Medicine, National Yang-Ming University,Taipei, Taiwan, China;
University of California San Francisco, SanFrancisco, CA, United States;
Cardinal Tien Hospital, College ofMedicine, Fu-Jen Catholic University, National Defence MedicineCenter, Taipei, Taiwan, China;
Cheng Hsin General Hospital, Taipei, Taiwan, China;
Department of Nursing, Kaohsiung MilitaryGeneral Hospital, Kaohsing, Taipei, Taiwan, China;
Division of General Surgery, Tri-ServiceGeneral Hospital, National Defence Medical Center, Taipei,Taiwan, China;
Community Medicine Research Center and Instituteof Public Health, National Yang-Ming University, Taipei, Taiwan,China;