1 Department of Allergy, Hospital Universitario La Paz, Madrid, Spain; Hospital La Paz Institute for Health Research, Madrid, Spain. Electronic address: anaentrala@gmail.com.
2 Department of Allergy, Hospital Universitario La Paz, Madrid, Spain; CIBER de Enfermedades Respiratorias, Madrid, Spain.
3 Hospital La Paz Institute for Health Research, Madrid, Spain.
4 Biostatistics Unit, Hospital La Paz Institute for Health Research, Madrid, Spain.
5 Department of Allergy, Hospital Universitario La Paz, Madrid, Spain; Hospital La Paz Institute for Health Research, Madrid, Spain; CIBER de Enfermedades Respiratorias, Madrid, Spain.
6 Hospital La Paz Institute for Health Research, Madrid, Spain; CIBER de Enfermedades Respiratorias, Madrid, Spain.