The changing epidemiology of multiple births in the United States
Russell, Rebecca B ; Petrini, Joann R ; Damus, Karla ; Mattison, Donald R ; Schwarz, Richard H
Obstetrics and gynecology (New York. 1953), 2003, Vol.101 (1), p.129-135 [Periódico revisado por pares]New York, NY: Elsevier Inc
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