Obstetric Labor, Premature

• The Simpson Centre for Reproductive Health, Royal Infirmary Edinburgh — Edinburgh, United Kingdom

• University of California, Los Angeles — Los Angeles, California, United States
• University of California, Irvine — Orange, California, United States
• University of California, Davis — Sacramento, California, United States
• University of California, San Diego — San Diego, California, United States

Not specified

• Stanford University School of Medicine — Stanford, California, United States

• Stanford University School of Medicine — Stanford, California, United States

• CHU de Besançon — Besançon, France

• Stanford University School of Medicine — Stanford, California, United States