Prognostic impact of additional extended surgical procedures in advanced-stage primary ovarian cancer. - Kommoss S; Rochon J; Harter P; Heitz F; Grabowski JP; Ewald-Riegler N; Haberstroh M; Neunhoeffer T; Barinoff J; Gomez R; Traut A; du Bois A (Annals of surgical oncology, 2010)