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Rationale and design of a randomized controlled trial of the effect of retinol and vitamin D supplementation on treatment in active pulmonary tuberculosis patients with diabetes

Qiuzhen Wang, Aiguo Ma*, Ib Christian Bygbjerg, Xiuxia Han, Yufeng Liu, Shanliang Zhao and Jing Cai

BMC Infectious Diseases 2013, 13:104  doi:10.1186/1471-2334-13-104