German Association of Endocrine Surgeons practice guideline for the surgical management of malignant thyroid tumors - Dralle, H; Musholt, T J; Schabram, J; Steinmüller, T; Frilling, A; Simon, D; Goretzki, P E; Niederle, B; Scheuba, C; Clerici, T; Hermann, M; Kußmann, J; Lorenz, K; Nies, C; Schabram, P; Trupka, A; Zielke, A; Karges, W; Luster, M; Schmid, K W; Vordermark, D; Schmoll, H J; Mühlenberg, R; Schober, O; Rimmele, H; Machens, A (Langenbecks Arch Surg, 2013)