MAGEA6 and breast cancer: To uncover the involvement of MAGE-A6 in breast cancer prognosis, we analyzed MAGE-A6 expression in breast cancer patients (Figure S7) and found a positive correlation between high expression of MAGE-A6 and poor prognosis (low survival rate) in lymph-node-positive patients (Figure S7D), but not in lymph-node-negative patients and triple-negative breast cancer (Figure S7B,D).