Children's lung function in relation to changes in socioeconomic, nutritional, and household factors over 20 years in Lanzhou - Li, Sai; Cao, Suzhen; Duan, Xiaoli; Zhang, Yaqun; Gong, Jicheng; Xu, Xiangyu; Guo, Qian; Meng, Xin; Bertrand, Mcswain; Zhang, Junfeng Jim (Journal of Thoracic DiseaseJournal of Thoracic Disease, 2021)