Effects of morphine, methylprednisolone and aminophylline on management of dyspnea in patients with advanced cancer
LIU Feng, WANG Mei-ling, YUAN Hai-hua, et al
上海交通大学学报（医学版） . 2013, (6): 823 .  DOI: 10.3969/j.issn.1674-8115.2013.06.025