CJCP     2017 19 (11):  1165-1168    ISSN: 1008-8830  CN: 43-1301/R Serum levels of 25-hydroxyvitamin D in children with tic disorders LI Hong-Hua, WANG Bing, SHAN Ling, WANG Cheng-Xin, JIA Fei-Yong Department of Developmental and Behavioral Pediatrics, First Hospital of Jilin University, Changchun 130021, China Received: 2017-08-22  Revised: 2017-09-29  Online: null Supporting info