1. Department of Anatomy; Faculty of Medicine; Khon Kaen University; Muang Khon Kaen Thailand
2. Neuroscience Research and Development Group; Khon Kaen University; Muang Khon Kaen Thailand
3. Department of Organ Anatomy; Graduate School of Medicine; Yamaguchi University; Ube Japan
4. Histology Laboratory; Keiai-kai Medical Corporation; Mizusawa Japan