1. Research Unit, Hospital Costa del Sol, Málaga, Spain

2. Research Network on Health Services in Chronic Diseases (REDISSEC)

3. Biomedical Research Institute of Málaga (Instituto de Investigación Biomédica de Málaga, IBIMA), Málaga, Spain

4. Surgery, Biochemistry and Immunology Department, Medical School, University of Málaga, Málaga, Spain

5. Department of Oncology, Hospital Costa del Sol, Marbella, Spain

6. Department of Epidemiology and Evaluation, Hospital del Mar, Barcelona, Spain

7. Department of Surgery, Hospital Costa del Sol, Marbella, Spain

8. Department of Radiology, Hospital Costa del Sol, Marbella, Spain

9. Department of Gynecology, Hospital del Mar, Barcelona, Spain