1 Department of Internal Medicine, Hospital Universitario de Fuenlabrada, Madrid 28942, Spain. Electronic address: david.bernal@salud.madrid.org.
2 Department of Internal Medicine, Hospital Universitario de Fuenlabrada, Madrid 28942, Spain; Department of Medicine, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain.
3 Department of Internal Medicine, Hospital Universitario de Fuenlabrada, Madrid 28942, Spain.
4 Department of Medicine, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain.