Division of Gastroenterology;
Department of Internal Medicine;
Cathay General Hospital;
School of Medicine;
National Taiwan University;
School of Medicine;
Taipei Medical University;
Taipei 10630;
Taiwan;
China;
Department of Otolaryngology;
Cathay General Hospital;
School of Medicine;
Fu Jen Catholic University;
Taipei 10630;
School of Public Health;
China Medical University;
Taichung 40402;
Taiwan;
China;
Department of Otolaryngology;
Cathay General Hospital;
Taipei 10630;
Taiwan;
China;