@article {21318,
	title = {Different Metrics (Number, Surface Area, and Volume Concentration) of Urban Particles with Varying Sizes in Relation to Fractional Exhaled Nitric Oxide (FeNO)},
	journal = {Journal of Thoracic Disease},
	volume = {11},
	year = {2019},
	pages = {1714-1726},
	url = {http://jtd.amegroups.com/article/view/28061/20919},
	author = {Gong, Jicheng and Zhu, Tong and Min Hu and Zhijun Wu and Zhang, Junfeng}
}
