Analysis of the effectiveness of cinnamon (Cinnamomum verum) in the reduction of glycemic and lipidic levels of adults with type 2 diabetes: a study protocol - Lira Neto, José Claudio Garcia; Damasceno, Marta Maria Coelho; Ciol, Márcia Aparecida; Freitas, Roberto Wagner Júnior Freire de; Araújo, Márcio Flávio Moura de; Teixeira, Carla Regina de Souza; Carvalho, Gerdane Celene Nunes; Lisboa, Kenya Waléria de Siqueira Coelho; Souza, Danilo Ferreira de; Nogueira, Jéssica de Menezes; Marques, Regina Lúcia Lino; Alencar, Ana Maria Parente Garcia (Medicine, 2020)