Duangkumpha, Kassaporn, Puangrat Yongvanit, Paiboon Sithithaworn, Anchalee Techasen, Nittaya Chamadol, Vallop Laopaiboon, Nisana Namwat, Narong Khuntikeo, Bandit Thinkhamrop, and Watcharin Loilome. 2019. “An Innovative Algorithm for Population-Based Risk Stratification Using Ultrasound for Periductal Fibrosis-Associated With CCA”. Archives of Allied Health Sciences 31 (3). Khon Kaen, Thailand:269-78. https://he01.tci-thaijo.org/index.php/ams/article/view/233144.