Physical Activity During Pregnancy and Preterm Birth: Findings From the 2015 Pelotas (Brazil) Birth Cohort Study. - Müller, Werner de Andrade; Mielke, Grégore Iven; da Silva, Inácio Crochemore M.; Silveira, Mariangela F.; Domingues, Marlos Rodrigues (Journal of Physical Activity & Health, 2020)