%0 Journal Article %T Preoperative vitamin D deficiency increases the risk of postoperative cognitive dysfunction: a predefined exploratory sub‐analysis %A Zhang, Y. %A Shan, G.‐J. %A Zhang, Y.‐X. %A Cao, S.‐J. %A Zhu, S.‐N. %A Li, H.‐J. %A Ma, D. %A Wang, D.‐X. %A , %J Acta Anaesthesiologica Scandinavica %V 62 %N 7 %P 924-935 %@ 0001-5172 %D 2018-01-01 %I Wiley Subscription Services, Inc., A Wiley Company %~ DeepDyve