The Growing Trend of Moderate Preterm Births: An Ecological Study in One Region of Brazil Oliveira, Rosana Rosseto de ; Melo, Emiliana Cristina ; Falavina, Larissa Pereira ; Mathias, Thais Aidar de Freitas Abstract Publication: PLoS ONE Pub Date: November 2015 DOI: 10.1371/journal.pone.0141852 Bibcode: 2015PLoSO..1041852O