CJCP     2015 17 (8):  837-840    ISSN: 1008-8830  CN: 43-1301/R Serum levels of 25-hydroxyvitamin D in children with attention deficit hyperactivity disorder SHANG-GUAN Li-Li, ZHAO Ya-Ru Department of Pediatrics, Shengjing Hospital, China Medical University, Shenyang 110004, China Received: 2015-04-08  Revised: 2015-06-08  Online: null Supporting info