CJCP     2013 15 (1):  29-32    ISSN: 1008-8830  CN: 43-1301/R Value of fractional nitric oxide concentration in exhaled breath in assessing level of asthma control in children XIANG Li, FU YA-Nan, LI Zhen, REN Yi-Xin, RAO Xiao-Chun Beijing Pediatric Research Institute, Beijing Children′s Hospital, Capital Medical University, Beijing 100045, China. drxiangli@163.com Received: null  Revised: null  Online: null Supporting info