1. Department of Immunology, Hospital Universitario 12 de Octubre, 28041 Madrid, Spain
2. Instituto de Investigación Sanitaria Hospital 12 de Octubre (imas12), 28041 Madrid, Spain
3. Department of Haematology, Hospital Universitario de Salamanca, 37007 Salamanca, Spain
4. Department of Occupational Medicine, Hospital Universitario 12 de Octubre, 28041 Madrid, Spain
5. Department of Haematology, Hospital Universitario 12 de Octubre, 28041 Madrid, Spain
6. Biomedical Research Centre Network for Epidemiology and Public Health (CIBERESP), 28029 Madrid, Spain