Chiu, Cheng-Ming, Chih-Pin Wang, Wen-Hsu Sung, Shih-Fong Huang, Shu-Chiung Chiang, and Po-Yi Tsai. 2009. “Functional Magnetic Stimulation in Constipation Associated With Parkinson’s Disease”. Journal of Rehabilitation Medicine 41 (13):1085-89. https://doi.org/10.2340/16501977-0456.