1. Clinical Immunology Department; University Hospital Gregorio Marañón; Madrid; Spain
2. Cardiology Department; University Hospital Gregorio Marañón; Madrid; Spain
3. Cardiovascular Surgery Department; University Hospital Gregorio Marañón; Madrid; Spain
4. Microbiology Department; University Hospital Gregorio Marañón; Madrid; Spain
5. Biochemistry Department; University Hospital Gregorio Marañón; Madrid; Spain
6. Transplant Immunology Group; Immunology Institute; Universitätsmedizin Charité; Berlin; Germany