Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Ji-Yong Yoon and Sung-Il Woo and Heon Kim and Yong-Han Sun and Youn-Soo Hahn,Fractional exhaled nitric oxide and forced expiratory flow between 25% and 75% of vital capacity in children with controlled asthma,Korean Journal of Pediatrics,1738-1061,Korean Pediatric Society,2012,55,9,330,https://cir.nii.ac.jp/crid/1364233270903594752,https://doi.org/10.3345/kjp.2012.55.9.330