Expert consensus on acute exacerbation of chronic obstructive pulmonary disease in the People's Republic of China oleh Cai BQ, Cai SX, Chen RC, Cui LY, Feng YL, Gu YT, Huang SG, Liu RY, Liu GN, Shi HZ, Shi Y, Song YL, Sun TY, Wang CZ, Wang JL, Wen FQ, Xiao W, Xu YJ, Yan XX, Yao WZ, Yu Q, Zhang J, Zheng JP, Liu J, Bai CX