1 Department of Pediatrics, Tufts-New England Medical Center, Boston, MA, USA; Perinatal ID Epidemiology Unit, Department of Pediatrics and Department of Gynecology, Hannover Medical School, Hannover, Germany; Neuroepidemiology Unit, Children's Hospital, Boston, MA, USA. Electronic address: odammann@tufts-nemc.org.
2 Department of Pediatrics, Wake Forest University School of Medicine, Winston-Salem, NC, USA.