R. Deryol, G. Avşar, M. Hakseven, S. Çulcu, G. Utkan, and A. E. Ünal, “Splenectomy Does Not Increase COVID-19 Risk or Mortality in Abdominal Cancer Surgery: A Retrospective Cohort Analysis”, Cerrahpaşa Medical Journal, vol. 50, no. 1, pp. 1–5, Feb. 2026.