1 Clinical Research Department, Faculty of Infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine, London UK; Hospital for Tropical Diseases, London, UK.
2 Infectious Diseases Department, Hospital Universitari Germans Trias i Pujol, Badalona 08916, Spain; Barcelona Institute for Global Health, University of Barcelona, Barcelona, Spain. Electronic address: omitja@flsida.org.