Identification of earlier predictors of pregnancy complications through wearable technologies in a Brazilian multicentre cohort: maternal actigraphy exploratory study I (MAES-I) study protocol - Souza, Renato T.; Cecatti, José Guilherme; Mayrink, Jussara; Galvão, Rafael Bessa; Costa, Maria Laura; Feitosa, Francisco; Rocha Filho, Edilberto; Leite, Debora F.; Vettorazzi, Janete; Tedesco, Ricardo P.; Santana, Danielly S.; Souza, João Paulo Dias de (BMJ Open, 2019)