[Treatment of retroperitoneal sarcoma in Germany : Results of a survey of the German Society of General and Visceral Surgery, the German Interdisciplinary Sarcoma Study Group and the advocacy group Das Lebenshaus].

[Treatment of retroperitoneal sarcoma in Germany : Results of a survey of the German Society of General and Visceral Surgery, the German Interdisciplinary Sarcoma Study Group and the advocacy group Das Lebenshaus].