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van der Kruijssen DEW, Elias SG, Vink GR, van Rooijen KL, 't Lam-Boer J, Mol L, Punt CJA, de Wilt JHW, Koopman M; CAIRO4 Working Group.van der Kruijssen DEW, et al.JAMA Surg. 2021 Dec 1;156(12):1093-1101. doi: 10.1001/jamasurg.2021.4992.JAMA Surg. 2021.PMID: 34613339Free PMC article.Clinical Trial.