1. U.G.C. Palliative Care, Hospital “Vázquez Díaz”, Huelva, Spain
2. U.G.C. Hematology, Hospital “Juan Ramón Jiménez”, Huelva, Spain
3. Librarian, Andalusian e-Health Library, Hospital “Juan Ramón Jiménez”, Huelva, Spain
4. Nursing Department, University of Huelva, Huelva, Spain
5. Centre for Community Science, Population & Social Health Program, Griffith Health Institute, Griffith University, Queensland, Australia