1. Cheng Hsin General Hospital, Pai-Tou, Taipei 112, Taiwan
2. The First Affiliated Hospital of Wenzhou Medical College, Zhejiang, Wenzhou 325000, China
3. Faculty of Medicine, School of Medicine, National Yang-Ming University, Pai-Tou, Taipei 112, Taiwan
4. Faculty of Public Health, School of Medicine, Fu-Jen Catholic University, Xinzhuang, Taipei 24205, Taiwan