title: Erratum to: Extraneural metastases in glioblastoma patients: two cases with YKL-40-positive glioblastomas and a meta-analysis of the literature.
authors: Unit of Neurology VIII-Molecular Neuro-Oncology, Foundation, I.R.C.C.S., Neurological National Institute C. Besta, Milan, Italy, anghileri.e@istituto-besta.it.
authors: Elena
authors: E
authors: Anghileri
authors: Melina
authors: M
authors: Castiglione
authors: Raffaele
authors: R
authors: Nunziata
authors: Carlo
authors: C
authors: Boffano
authors: Vittoria
authors: V
authors: Nazzi
authors: Francesco
authors: F
authors: Acerbi
authors: Gaetano
authors: G
authors: Finocchiaro
authors: Marica
authors: M
authors: Eoli