1. Cardiology Department, Universitary Hospital of Burgos, 09006 Burgos, Spain
2. Haematology Department, Universitary Hospital of Burgos, 09006 Burgos, Spain
3. Neurosurgery Department, Universitary Hospital of Burgos, 09006 Burgos, Spain
4. Facultad de Ciencias de la Salud, Universidad Isabel I, 09003 Burgos, Spain