1. T.H. Chan School of Public Health, Harvard University, Boston, Massachusetts
2. Herbert Wertheim School of Public Health, University of California San Diego, La Jolla, California
3. Nucleo de Investigação, Departamento de Medicina, Maputo Central Hospital, Maputo, Mozambique
4. Division of Pulmonary, Critical Care, Sleep Medicine and Physiology, University of California San Diego, La Jolla, California
5. Faculty of Medicine, Eduardo Mondlane University, Maputo, Mozambique