1. Faculty of Medicine, Khon Kaen University; Department of Orthopaedics; Khon Kaen 40000 Thailand
2. Khon Kaen University; Department of Biostatistics and Demography; Faculty of Public Health Khon Kaen Thailand 40002
3. Faculty of Medicine, Khon Kaen University; Pharmacology; Khon Kaen Thailand 40000
4. Faculty of Medicine, Khon Kaen University; Department of Orthopaedics; Khon Kaen Thailand 40002