1. Chair of Epidemiology and Preventive Medicine, Department of Hygiene and Dietetics; Jagiellonian University Medical College; Krakow Poland
2. 2nd Department of General Surgery; Jagiellonian University Medical College; Krakow Poland
3. Department of Surgical Oncology; The Maria Sklodowska-Curie National Research Institute of Oncology, Krakow Branch; Department of Anatomy, Jagiellonian University Medical College; Krakow Poland
4. Faculty of Medicine & Health Sciences; Andrzej Frycz Modrzewski Krakow University; Krakow Poland
5. Radiotherapy Centre Amethyst; Rydygier Memorial Hospital; Krakow Poland
6. Center for Oncology Diagnosis and Therapy; NU-MED; Zamosc Poland
7. Brachytherapy Department; University Hospital; Krakow Poland
8. Bone Marrow Transplantation and Oncohematology Department; Maria Sklodowska-Curie National Research Institute of Oncology, Gliwice Branch; Gliwice Poland
9. Kleijnen Systematic Reviews Ltd; York UK