Clinical Epidemiology Unit;
Faculty of Medicine;
Chiang Mai University;
Chiang Mai;
Thailand;
Department of Microbiology;
Faculty of Medicine;
Chiang Mai University;
Chiang Mai;
Thailand;
Division of Respiratory Medicine;
Chest Disease Institute;
Nonthaburi;
Thailand;
Faculty of Medicine;
Thammasat University;
Bangkok;
Thailand;
Office of Disease Prevention and Control 10;
Chiang Mai;
Thailand;
Department of Pathology;
Faculty of Medicine;
Chiang Mai University;
Chiang Mai;
Thailand;