DOI:
10.1055/s-00030576
Revista Brasileira de Ginecologia e Obstetrícia / RBGO Gynecology and Obstetrics
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References
Lieberman E, Ryan KJ, Monson RR, Schoenbaum SC.
Risk factors accounting for racial differences in the rate of premature birth.
N Engl J Med 1987;
317 (12) 743-748
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