1. Faculty of Medicine, Khon Kaen University; Orthopedics; 123 Mithraphap rd, Muang District Thailand 40002
2. Khon Kaen University; Department of Biostatistics and Demography, Faculty of Public Health; Mitraparp Road Mueng District Khon Kaen Khon Kaen Thailand 40002
3. Khon Kaen University; Statistics; 123 Mittapap Khon Kaen Thailand 40002
4. Graduate School of Medicine, Kanazawa University; Orthopedic Surgery; 13-1 Takara-machi Kanazawa Japan 920-8641
5. Khon Kaen University; Department of Epidemiology and Biostatistics, Faculty of Public Health; 123 Mitraparb Road Amphur Muang Khon Kaen Thailand 40002
6. Faculty of Medicine, Khon Kaen University; Department of Pediatrics; 123 Mithraphap rd, Muang district Thailand 40002