1. Department of Pediatric Infectious Diseases and Immunology, School of Medicine, Pontificia Universidad Católica De Chile, Santiago, Chile
2. Grupo de Sanidad de la IV Brigada, Fuerza Aérea De Chile, Punta Arenas, Chile
3. Department of Emergency Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
4. Millennium Institute on Immunology and Immunotherapy, School of Medicine, Pontificia Universidad Católica De Chile, Santiago, Chile