Using the Robson classification to assess caesarean section rates in Brazil: an observational study of more than 24 million births from 2011 to 2017. - Paixao, Enny S.; Bottomley, Christian; Smeeth, Liam; da Costa, Maria Conceicao N.; Teixeira, Maria Gloria; Ichihara, Maria Yury; Gabrielli, Ligia; Barreto, Mauricio L.; Campbell, Oona M. R. (BMC Pregnancy & Childbirth, 2021)