ERBB2 and breast cancer: A potential solution for this problem would be dividing the food group into corresponding food sources to specify their precise influences (e.g., rather than evaluating the consumption frequency of the healthy protein group, it is more appropriate to identify the intake frequency of each food item, such as soybean products, lean meat, fish, and egg whites); (6) Stratification of breast cancer by specific characteristics should be considered in further studies, especially hormone (estrogen and progesterone) receptor and human epidermal growth factor receptor 2 (HER-2) status [25].