1. Hepatology and Liver Transplantation Unit, Hospital General Universitario Gregorio Marañón, Madrid, Spain
2. Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), Hospital General Universitario Gregorio Marañón, Madrid, Spain
3. Microbiology Department, Hospital General Universitario Gregorio Marañón, Madrid, Spain
4. Red Cross University College of Nursing, Spanish Red Cross, Autonomous University of Madrid, Madrid, Spain