CJCP     2012 14 (4):  285-288    ISSN: 1008-8830  CN: 43-1301/R Association of CLOCK gene T3111C polymorphism with attention deficit hyperactivity disorder and related sleep disturbances in children CAO Yin-Li, CUI Qin-Tao, TANG Cheng-He, CHANG Xiao First Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan 453100, China. caoyinli2011@163.com Received: null  Revised: null  Online: null Supporting info