ERBB2 and breast cancer: Bioinformatics analysis in various carcinomas reported that high levels of C1q have a favorable prognostic index in basal-like breast cancer (Mangogna et al., 2019a), HER-2 positive breast cancer (Mangogna et al., 2019a), and skin cutaneous melanoma (Liang et al., 2022; Yang et al., 2022).