Malignant ectomesenchymoma in children: The European pediatric Soft tissue sarcoma Study Group experience

Giuseppe Maria Milano, Daniel Orbach, Michela Casanova, Pablo Berlanga, Reineke A. Schoot, Nadege Corradini, Bernadette Brennan, Gema L. Ramirez-Villar, Lisa Lyngsie Hjalgrim, Max M. van Noesel, Rita Alaggio, Andrea Ferrari