Department of Medicine Hospital Bentong Bentong Pahang Malaysia;
Institute for Public Health National Institute of Health Malaysia Ministry of Health Malaysia Selangor Malaysia;
Department of Medicine Hospital Sultan Haji Ahmad Shah Temerloh Pahang Malaysia;
Department of Pathology Hospital Sultan Haji Ahmad Shah Temerloh Pahang Malaysia;
Department of Medicine Hospital Kuala Lipis Kuala Lipis Pahang Malaysia;