[1] Nicolaus Copernicus Univ Torun, Coll Med Bydgoszcz, Dept Gen Gastroenterol & Oncol Surg, Torun, Poland
[2] Med Univ Warsaw, Dept Gen Vasc & Oncol Surg, Warsaw, Poland
[3] Jagiellonian Univ, Dept Gen Surg 2, Med Coll, Krakow, Poland
[4] Ludwik Rydygier Mem Hosp, Dept Gen & Oncol Surg, Krakow, Poland
[5] Orlowski Hosp, Med Ctr Postgrad Educ, Dept Gen Oncol & Digest Tract Surg, Warsaw, Poland
[6] Gdansk Med Univ, Dept Gen Endocrine & Transplant Surg, Gdansk, Poland
[7] Med Univ Warsaw, Dept Clin Dietet, Warsaw, Poland
[8] Specialised Hosp Profamilia, Dept Endoscop & Metab Surg, Rzeszow, Poland
[9] SWPS Univ Social Sci & Humanities, Warsaw, Poland
[10] Med Univ Bialystok, Clin Dept Gen & Endocrine Surg 1, Bialystok, Poland
[11] RCZ, Dept Gen Surg, Lubin, Poland
[12] Mil Med Inst, Clin Dept Anaesthesiol & Intens Care, Warsaw, Poland
[13] Med Univ Silesia, Dept Gen & Endocrinol Surg, Katowice, Poland
[14] Univ Warmia Mazury, Dept Gen Metab & Bariatr Surg, Olsztyn, Poland
[15] Med Univ Warsaw, Dept Gen Surg & Transplantol, Warsaw, Poland
[16] Univ Warmia & Mazury, Clin Gen Minimally Invas & Elderly Surg, Olsztyn, Poland
[17] Outpatient Clin Lublin, Dept Gen Surg Subunit Vasc Surg, Mil Clin Hosp 1, Elk, Poland