CJCP     2011 13 (9):  722-724    ISSN: 1008-8830  CN: 43-1301/R Relationship between serum ferritin levels and susceptibility to attention deficit hyperactivity disorder in children: a Meta analysis TAN Li-Na, WEI Hai-Yan, ZHANG Yao-Dong, LU Ai-Lian, LI Ying Zhengzhou Children′s Hospital, Zhengzhou 450053, China. syek@163.com Received: null  Revised: null  Online: null Supporting info