Suanrueang, Passakorn, and Utoomporn Wongsin. 2019. “A Time-Motion Study of Medical Specialists: a Case Study in Eight Public Hospitals”. Journal of Health Systems Research 13 (4). Nonthaburi, Thailand:428-41. https://he04.tci-thaijo.org/index.php/j_hsr/article/view/3676.