Characteristics and publication fate of unregistered and retrospectively registered clinical trials submitted to The BMJ over 4 years

• 期刊名称BMJ Open
• 作者Loder, Elizabeth; Loder, Stephen; Cook, Sophie
• 卷第8卷
• 期第2期
• 印刷ISSN2044-6055
• 电子ISSN2044-6055
• 文件大小273.61KB
• 发表时间2018-02
• DOI10.1136/bmjopen-2017-020037