The Cleveland Clinic Foundation, Cleveland, Ohio, United States
University of Pittsburgh, Pittsburgh, Pennsylvania, United States
University of Chicago, Chicago, Illinois, United States
Perinatal HIV Research Unit, Chris Hani Baragwanath Hospital, Soweto, South Africa
Themba Lethu Clinic, Helen Joseph Hospital, Westdene, Johannesburg, South Africa
Riley Hospital for Children, Indianapolis, Indiana, United States
Hopital Femmes Meres Enfants, Bron Cedex, France
Hospital Universitario De Getafe, Madrid, Spain
Peter J. Ruane, MD, Inc., Los Angeles, California, United States
Anthony M Mills, MD, Los Angeles, California, United States
Orange Coast Medical Group, Newport Beach, California, United States