Study Design. This study was a prospective, randomized, evaluator-blind, controlled study. The study was approved by the Human Research Ethics Committee of the Faculty of Medicine, Chiang Mai University, and complied with the Helsinki Declaration.
Study Design. This study was a prospective, randomized,evaluator-blind, controlled study. The study was approvedby the Human Research Ethics Committee of the Facultyof Medicine, Chiang Mai University, and complied with theHelsinki Declaration.