ERBB4 and neoplasm: Consequently, we selected tumor samples of our study which had presented by MLPA different HER-status combinations: FITR21 (negative for all the four HERs), FITR37 (HER1, HER3 and HER4 negative, HER2 positive), FITR39 (positive for all the four HERs) and FITR8 (HER1 and HER2 negative, HER3 and HER4 positive) (see details in Table 2).