Efficacy and safety of inhaled ambroxol solution in improving sputum of lower respiratory tract infection in children: a multicenter, randomized, double-blind, placebo-controlled t... by Baoping Xu, Peng Han, Yunxiao Shang, Huanji Cheng, Zhiying Han, Lin Zhao, Shaoru He, Min Lu, Enmei Liu, Kunling Shen

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