1. Puerto Montt Hospital, Puerto Montt, Chile
2. Hospital Clinico Regional, Valdivia, Chile
3. Hospital Universitario Austral, Pilar, Argentina
4. Centro de Infectologia, Buenos Aires, Argentina
5. Royal Infirmary of Edinburgh, Edinburgh, Scotland
6. Division of Infectious Diseases, University of Louisville, Louisville, Kentucky, USA
7. Clinical San Roque y Centro Medico La Costa, Asuncion, Paraguay
8. Instituto de Investigaciones Medicas A Lanari, Buenos Aires, Argentina
9. Orlando Regional Medical Center, Orlando, Florida, USA
10. Sanatorio 9 de Julio, Tucuman, Argentina
11. Hospital Zenon Santillan, Tucuman, Argentina
12. Sanatorio Otamendi Miroli, Buenos Aires, Argentina
13. Instituto de Neumonologia y Cirugia Toracica, Barcelona, Spain
14. Hospital Maciel, Montevideo, Uruguay
15. Instituto Nacional del Torax, Santiago, Chile
16. Hospital van Buren, Escuela de Medicina, Universidad de Valparaíso, Chile
17. Hospital Universitario Joan XXIII de Tarragona, Tarragona, Spain
18. Providence Hospital, Washington, DC, USA
19. Johannesburg Hospital, Johannesburg, South Africa
20. Istituto di Ricovero e Cura a Carattere Scientifico Fondazione Policlinico, Milan, Italy
21. Institute of Respiratory Diseases, University of Milan, Milan, Italy
22. Emergency Medicine Department, Ospedale Maggiore,Milan, Italy
23. Hospital Prof. Dr. Bernardo Houssay, Vicente López, Argentina
24. Emprendimientos Médico Hospitalarios S A, Mar del Plata, Argentina
25. Medizinische Hochschule Hannover, Hannover, Germany
26. Division of Pulmonary, Critical Care and Sleep Disorders Medicine, University of Louisville, Louisville, Kentucky, USA
27. Pulmonary and Critical Care Section, Veterans Affairs Medical Center, Louisville, Kentucky, USA