Parekh D, Dancer RCA, Scott A, D'Souza VK, Howells PA, Mahida RY, Tang JCY, Cooper MS, Fraser WD, Tan L, Gao F, Martineau AR, Tucker O, Perkins GD, Thickett DR. Vitamin D to prevent lung injury following esophagectomy-a randomized, placebo-controlled trial. Crit Care Med. 2018 Dec;46(12):e1128-35. doi: 10.1097/CCM.0000000000003405