TY - JOUR T1 - BIrth spacing and adverse perinatal outcomes Y1 - 2006/08/23 N1 - 10.1001/jama.296.8.929-a JO - JAMA SP - 929 EP - 934 VL - 296 IS - 8 N2 - SN - 0098-7484 M3 - doi: 10.1001/jama.296.8.929-a UR - http://dx.doi.org/10.1001/jama.296.8.929-a ER -