Incidence and time trend of surgical site infection in Ramathibodi Hospital during the years 2003-2005. Use of HIV Postexposure Prophylaxis in healthcare workers after occupational exposure: a Thai university hospital setting. Occupational Exposures to Blood and Body Fluids among Healthcare Workers H1N1 2009 influenza among healthcare workers in a tertiary care hospital in Thailand Five-year prospective study of tuberculin skin testing among new healthcare personnel at a university hospital in Thailand