Lidström A.-K., Sund F., Albinsson B., Lindbäck J., and Westman G., “Work at inpatient care units is associated with an increased risk of SARS-CoV-2 infection; a cross-sectional study of 8679 healthcare workers in Sweden”, ujms, vol. 125, no. 4, pp. 305–310, Jul. 2020.