Phunpae, P.; Sriruan, C.; Udpoun, R.; Buamongkol, S.; Pawichai, S.; Ruangpayuk, A.; Chairuangwut, W. Bacterial Contamination and Their Tolerance in Banknotes and Coins Surrounding the Area of Chiang Mai University Hospital in Chiang Mai Province. J Assoc Med Sci 2018, 51, 171-179.