Obstetric factors and mother-to-child transmission of humanimmunodeficiency virus type 1: The French perinatal cohorts
SEROGEST and The French Pediatric HIV Infection Study Group;Mandelbrot;Mayaux;Bongain;Berrebi;Moudoub-Jeanpetit;Benifla;Ciraru-Vigneron;Le Chenadec;Blanche;Delfraissy;