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Original Research
Vitamin D deficiency is associated with the severity of COPD: a systematic review and meta-analysis
Biyuan Zhu1 The Fifth Internal Medicine Department, Guangzhou University of Chinese Medicine, Dongguan City, People’s Republic of China
, Biqing Zhu2 Department of Laboratory Medicine, Guangzhou University of Chinese Medicine, Dongguan City, People’s Republic of China
, Chaolie Xiao3 Department of Intensive Care Unit, Dongguan Hospital of Traditional Chinese Medicine, Guangzhou University of Chinese Medicine, Dongguan City, People’s Republic of China
& Zhiwen Zheng1 The Fifth Internal Medicine Department, Guangzhou University of Chinese Medicine, Dongguan City, People’s Republic of ChinaCorrespondence[email protected]
Pages 1907-1916
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Published online: 11 Sep 2015
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