CJCP     2011 13 (11):  900-903    ISSN: 1008-8830  CN: 43-1301/R Investigation on the behavior problems of children aged 3 to 5 years in Changsha and comparison of the norm of Conners Parent Symptom Questionnaire in Chinese and American urban children GUO Ru, MAO Ding-An, LI Jie-Min, LUO Xue-Mei, JIANG Yan, LIU Ji-Hong Department of Pediatrics, Second Xiangya Hospital, Central South University, Changsha 410011, China. min127910@sina.com.cn Received: null  Revised: null  Online: null Supporting info