B. Principal component (PC) analysis of the expression signature of human neuroblastoma (NB) and 5 other human cancers (BRCA: breast adenocarcinoma; COAD: colon adenocarcinoma; LUAD: lung adenocarcinoma; KIRC: kidney renal clear cell carcinoma; GBM: glioblastoma multiforme) with mice tumour samples mapped independently using PC coordinates. MYCN amplified NB samples are indicated by circles and non-amplified samples are indicated by squares. 