1 Infectious Disease Unit, Specialty Internal Medicine, Johns Hopkins Aramco Healthcare, Dhahran, Saudi Arabia.
2 Division of Infectious Diseases, Indiana University School of Medicine, Indianapolis, IN, USA.
3 Division of Infectious Diseases, Johns Hopkins University, Baltimore, MD, USA.
4 Aix Marseille Univ, IRD, AP-HM, SSA, VITROME, Marseille, France.
5 IHU-Méditerranée Infection, Marseille, France.
6 WHO Collaborating Centre for Travellers' Health, Institute for Epidemiology, Biostatistics and Prevention, University of Zürich Centre for Travel Medicine, MilMedBiol Competence Centre, University of Zürich, Switzerland.