Welcoming delegation from School of Dentistry, University of Texas, USA. Professor Robert Spear, Ph.D, MS, BS, Department of Diagnostic and Biomedical Sciences and Professor Sudarat Kiat-Amnuay DDS, MS, Department of General Practice and Dental Public Health on the occasion of visiting the Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand July 12, 2019