Obstetric Labor, Premature

• University of Alabama at Birmingham — Birmingham, Alabama, United States
• University of South Alabama — Mobile, Alabama, United States
• Vallywise Health Medical Center — Phoenix, Arizona, United States
• Loma Linda University Children's Hospital — Loma Linda, California, United States

• The University of California San Diego — San Diego, California, United States
• University of California San Francisco — San Francisco, California, United States
• Yale University — New Haven, Connecticut, United States
• Northwestern University — Chicago, Illinois, United States

• University of Calgary, Cumming School of Medicine — Calgary, Alberta, Canada
• Alberta Health Services; University of Alberta — Edmonton, Alberta, Canada
• Royal Columbian Hospital — New Westminster, British Columbia, Canada
• Fraser Health, University of British Columbia; Jim Pattison Outpatient Care and Surgery Centre — Surrey, British Columbia, Canada

Not specified

• The Valley Hospital — Ridgewood, New Jersey, United States

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

• McMaster University Medical Centre — Hamilton, Ontario, Canada

• Morgan Stanley Children's Hospital of New York (MSCHONY) — New York, United States
• University Texas Health Science Center San Antonio (UTHSCSA) — San Antonio, Texas, United States

• The Valley Hospital — Ridgewood, New Jersey, United States
• Morgan Stanley Children's Hospital of New York (MSCHONY) — New York, United States

• Hillel Yaffe Medical Center — Hadera, Israel