However, no association was found in samples from cancer patients between age (P = 0.868), smoking status (P = 0.852), genetic ancestry (European P = 0.064; African P = 0.675; Native American P = 0.898), tumor stage (P = 0.716), histological type of tumor (P = 0.187), hormone receptors (ER P = 1; PR P = 0.112; Her2 P = 0.494) and the subgroups derived from cluster analysis. The gene discussed is ERBB2; the disease is cancer.