Discussion about stable carbon isotopic composition indicates large presence of maize in Brazilian soy sauces (shoyu) Response to "Discussion about stable carbon isotopic composition indicates large presence of maize in Brazilian soy sauces (shoyu)" - Dong, Hao; Xiao, Kaijun; Morais, Maristela Calvente; Martinelli, Luiz Antonio (Journal of Food Composition and Analysis, 2019)