Chronobiology International, 37(9-10), 1325-1334. Informa Healthcare Middeldorp, M, Loef, B, van der Beek, A J, van Baarle, D & Proper, K I 2020, ' Sickness absenteeism, work performance, and healthcare use due to respiratory infections for shift and non-shift workers ', Chronobiology International, vol. 37, no. 9-10, pp. 1325-1334 . https://doi.org/10.1080/07420528.2020.1825468