[1] Georgia Regents Univ, Dept Obstet & Gynecol, Augusta, GA USA
[2] Georgia Regents Univ, Med Coll Georgia, Augusta, GA USA
[3] Georgia Regents Univ, Dept Ambulatory Care, Augusta, GA 30912 USA
[4] CSRA Nursing Associates, PC, Augusta, GA 30907 USA
[5] Georgia Regents Univ, Med Coll Georgia, Evaluat Serv, Augusta, GA 30912 USA
[6] Georgia Regents Univ, Dept Biostat & Epidemiol, Med Coll Georgia, Augusta, GA 30912 USA