MAP2K2 and neuroblastoma: High expression of both RAF1 and MAP2K2 showed poor overall survival of NB patients (Kocak n = 649, RAF1 p = 2.9 × 10−7, MAP2K2 p = 9.0 × 10−18; SEQC n = 498, MAP2K2 p = 1.1 × 10−21; Versteeg n = 88, RAF1 p = 6.1 × 10−3, MAP2K2 p = 1.2 × 10−6; Figure 1A–C and Figure 2A,B).