Infant, Premature, Diseases

• The Children's Hospital of Philadelphia — Philadelphia, Pennsylvania, United States

• Complejo Hospitalario Universitario Insular Materno Infantil — Las Palmas de Gran Canaria, Las Palmas, Spain

• Phoenix Children's Hospital — Phoenix, Arizona, United States
• St. Joseph's Hospital and Medical Center — Phoenix, Arizona, United States
• Loma Linda University School of Medicine — Loma Linda, California, United States
• Children's Hospital of Orange County — Orange, California, United States

Not specified

• Wake Forest University School of Medicine — Winston-Salem, North Carolina, United States

• Stanford University — Palo Alto, California, United States
• Yale University — New Haven, Connecticut, United States
• George Washington University — Washington D.C., District of Columbia, United States
• University of Miami — Miami, Florida, United States

• University of Alabama at Birmingham — Birmingham, Alabama, United States
• Stanford University — Palo Alto, California, United States
• Yale University — New Haven, Connecticut, United States
• George Washington University — Washington D.C., District of Columbia, United States

• University of Alabama — Birmingham, Alabama, United States
• Stanford University — Palo Alto, California, United States
• University of California at San Diego — San Diego, California, United States
• Yale University — New Haven, Connecticut, United States

Not specified

• Gynecology and Obstetrics hospital, Ain-Shams University — Cairo, Egypt