The penetrance of MEN2 pheochromocytoma is not only determined by RET mutations. Issue 8 (August 2017) - Castinetti, Frederic; Maia, Ana Luiza; Peczkowska, Mariola; Barontini, Marta; Hasse-Lazar, Kornelia; Links, Thera P; Toledo, Rodrigo A; Dvorakova, Sarka; Mian, Caterina; Bugalho, Maria Joao; Zovato, Stefania; Alevizaki, Maria; et al.