1. Massey University - Auckland; School of Health Sciences; 24 Portsea Place Chatswood, North Shore Auckland New Zealand
2. St George's Hospital Medical School; Cardiovascular Medicine; Cranmer Terrace London UK SW17 0RE
3. Escola Paulista de Medicina, Universidade Federal de São Paulo; Disciplina de Pneumologia; Rua Botucatu 740 - 3o. andar São Paulo São Paulo Brazil 04023-062
4. State University of Heath Science; Department of Public Health; 113, Jorge de Lima Street Trapiche Maceió Alagoas Brazil 57010382
5. Centro de Estudos de Medicina Baseada em Evidências e Avaliação Tecnológica em Saúde; Brazilian Cochrane Centre; R. Borges Lagoa, 564 cj 63 Vila Clementino São Paulo São Paulo Brazil 04038000
6. Institut Universitaire de Cardiologie et de Pneumologie de Québec, Hôpital Laval; 2725 Chemin Sainte-Foy Québec Quebec Canada G1V 4G5
7. West Park Healthcare Centre, University of Toronto; Division of Respiratory Medicine; 82 Buttonwood Avenue Toronto Ontario Canada M6M 2J5