Gut‐lung axis and asthma: A historical review on mechanism and future perspective oleh Xiu‐Ling Song, Juan Liang, Shao‐Zhu Lin, Yu‐Wei Xie, Chuang‐Hong Ke, Dang Ao, Jun Lu, Xue‐Mei Chen, Ying‐Zhi He, Xiao‐Hua Liu, Wen Li