CJCP     2016 18 (1):  61-66    ISSN: 1008-8830  CN: 43-1301/R Association between anxiety-depression and 5-HTTLPR gene polymorphism in school-aged twins ZHAO Qiao, LI Yu-Ling, Enherbayaer, LIU Yan, DING Yi Institute of Life Science and Technology, Inner Mongolia Normal University, Huhhot 010022, China Received: 2015-10-28  Revised: 2015-12-08  Online: null Supporting info null