TY - JOUR A1 - Wingate, M. A1 - G., Alexander T1 - The healthy migrant theory: Variations in pregnancy outcomes among US-born migrants Y1 - 2006 DO - 10.1016/j.socscimed.2005.06.015 JF - Social Science & Medicine VL - 62 IS - 2 SP - 491 EP - -498 ER -