(DOCX) Reference 1 Dunlop AL, Essalmi AG, Alvalos L, Breton C, Camargo CA, Cowell WJ, et al. (2021) Racial and geographic variation in effects of maternal education and neighborhood-level measures of socioeconomic status on gestational age at birth: Findings from the ECHO cohorts. The third author's name is spelled incorrectly in the manuscript and supporting information table S1 Funding. The correct citation is: Dunlop AL, Essalmi AG, Avalos L, Breton C, Camargo CA, et al. (2021) Racial and geographic variation in effects of maternal education and neighborhood-level measures of socioeconomic status on gestational age at birth: Findings from the ECHO cohorts. [Extracted from the article]