1 Department of Surgery, University of Cincinnati College of Medicine, Cincinnati, OH, USA; OASIS Global, Cincinnati, OH, USA.
2 Institute of Hygiene and Environmental Medicine, Charité-University Medicine, Berlin, Germany.
3 Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Armstrong Institute for Patient Safety and Quality, Johns Hopkins Medicine, Baltimore, MD, USA.
4 Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland.
5 Infection Prevention and Control Global Unit, Service Delivery and Safety, World Health Organization, Avenue Appia, 1211 Geneva 27, Switzerland. Electronic address: allegranzib@who.int.