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McNally, J.D., Ginde, A.A. & Amrein, K. Clarification needed for the systematic review of vitamin D trials in the ICU. Intensive Care Med 43, 595–596 (2017). https://doi.org/10.1007/s00134-016-4643-6
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DOI: https://doi.org/10.1007/s00134-016-4643-6