Development and external validation of a dynamic prognostic nomogram for primary extremity soft tissue sarcoma survivors oleh Dario Callegaro, Rosalba Miceli, Sylvie Bonvalot, Peter C. Ferguson, Dirk C. Strauss, Veroniek V.M. van Praag, Antonin Levy, Anthony M. Griffin, Andrew J. Hayes, Silvia Stacchiotti, Cecile Le Pèchoux, Myles J. Smith, Marco Fiore, Angelo Paolo Dei Tos, Henry G. Smith, Charles Catton, Joanna Szkandera, Andreas Leithner, Michiel A.J. van de Sande, Paolo G. Casali, Jay S. Wunder, Alessandro Gronchi