Influences of weight, age, gender, genetics, diseases, and ethnicity on bitterness perception: a narrative review of current methodological - Shizukuda, Satye; Marchini, Julio Sergio; Adell, Adriana; Santos, Marcelo Alexandre; Brandao, Camila Fernanda Cunha; Lima, Cristiane Maria Martires; Cunha, Selma Freire de Carvalho da; Itikawa, Emerson Nobuyuki; Silvah, José Henrique da (Nutrire, 2018)