Empirical polymyxin B therapy in febrile neutropenic patients with hematological diseases: A prospective, multicenter, observational clinical study. Issue 4 (April 2023) - Ma, Liya; Shen, Jianping; Jiang, Huifang; Qian, Shenxian; Zhang, Jin; Lan, Jianping; Zhou, Hua; Lang, Wei; Mei, Chen; Zhou, Xinping; Zhu, Lixia; Xu, Gaixiang; et al.