Etiology and clinical features of children with bronchiectasis in China: A 10‐year multicenter retrospective study oleh Hao Wang, Bao‐ping Xu, Yan‐min Bao, Yungang Yang, Li‐ling Qian, Hai‐lin Zhang, Chun‐mei Zhu, Yong Yin, Min Jiang, Ji‐hong Dai, Yong‐sheng Xu, Xiao‐hua Zhu, Xiao‐ping Zhu, Kun‐ling Shen