Korompeli, A. Kavrochorianou, N. Molcan, L. Muurlink, O. Boutzouka, E. Myrianthefs, P. Fildissis, G., Light affects heart rate's 24-h rhythmicity in intensive care unit patients: an observational study, Nursing in Critical Care, (24), 320-325, 2019, Wiley-Blackwell Publishing Ltd, 1362-1017, 1478-5153