Rutkowski, Piotr, Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology Department of Soft Tissue/Osteosarcoma and Melanoma, Warsaw Rutkowski, Piotr Rutkowski, Piotr Rybak, Janusz, Department of Vascular Surgery and Angiology, Medical University of Lublin, Poland Rybak, Janusz Rydel, Weronika Rylski, Rafal, Vascular Surgery Clinic, Voivodeship Polyclinic Hospital in Kielce, Poland Rzepa, Teresa, University of Social Sciences and Humanities, Department of Poznan Rzepa, Teresa Sacha, Edyta Sacha, Tomasz Sachanbinski, Tomasz Sadakierska-Chudy, Anna Sadowski, Marcin Sadowski, Marcin Şahin, İrfan Sahli, Sondes, Pediatric surgery department “A”.children hospital.Tunis. Manar university Tunis tunisia Sajdak, Stefan, Department of Surgical Gynaecology, University of Medical Sciences, Poznan Sajdak, Stefan Sajdak, Stefan Salahuddin, Momin Samad, Rabih Sanak, Marek Santos, Marcio Luiz Tostes dos Sapian-Raczkowska, Bożena