HER2 expression in salivary gland carcinomas: dependence on histological subtype - Glisson, B; Colevas, A D; Haddad, R; Krane, J; El-Naggar, A; Kies, M; Costello, R; Summey, C; Arquette, M; Langer, C; Amrein, P C; Posner, M (Clin Cancer Res, 2004)