1. Corporacio Sanitaria Parc Taulí, Fundacio Parc Tauli, Sabadell, Spain
2. Sleep Center, The Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, PA
3. Unitat de Biofisica i Bioenginyeria, Facultat de Medicina, Universitat de Barcelona-IDIBAPS, Barcelona, Spain
4. CIBER de Enfermedades Respiratorias, Madrid, Spain
5. Laboratori de la Son, Pneumologia, Hospital Clínic-IDIBAPS, Barcelona, Spain