CJCP     2012 14 (12):  924-927    ISSN: 1008-8830  CN: 43-1301/R Levels of nerve growth factor and interleukin-4 in the induced sputum of children with cough variant asthma LI Hong-Zi, JIN Zheng-Yong, YUAN Xi-Zhe, JIN Chun-Ji Department of Pediatrics, Affiliated Hospital of Yanbian University, Yanbian, Jilin 133000, China. lihongzi1972@hotmail.com Received: null  Revised: null  Online: null Supporting info