Cesarean or Vaginal Birth Does Not Impact the Longitudinal Development of the Gut Microbiome in a Cohort of Exclusively Preterm Infants oleh Christopher J. Stewart, Nicholas D. Embleton, Elizabeth Clements, Pamela N. Luna, Daniel P. Smith, Tatiana Y. Fofanova, Andrew Nelson, Gillian Taylor, Caroline H. Orr, Joseph F. Petrosino, Janet E. Berrington, Stephen P. Cummings