1. Pharmaceutical Outcomes Research and Policy Program; School of Pharmacy; University of Washington; Seattle WA USA
2. School of Public Health; University of Puerto Rico; San Juan Puerto Rico USA
3. Merck & Co., Inc; Carolina Puerto Rico USA
4. Merck & Co., Inc; Whitehouse Station NJ USA
5. Pulmonary Rehabilitation Center Federal University of São Paulo (Unifesp); São Paulo
6. Associação de Assistência à Criança Deficiente (AACD); São Paulo Brazil
7. Instituto Nacional de Enfermedades Respiratorias Ismael Cosio Villegas; México, D.F México