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American College of Gastroenterology
American Gastroenterological Association, The
American Society for Gastrointestinal Endoscopy
American Society of Transplantation
Cold Spring Harbor Laboratory
American Board of Obstetrics and Gynecology
Medical Center
Baptist Medical Center
ClinicalTrials.gov
Elsevier
PubMed Central
No Pub/Vend Assigned
Karger
New England Journal of Medicine
American College of Obstetricians & Gynecologists
MedlinePlus
Medscape
OVID
National Institute of Diabetes & Digestive & Kidney Diseases (NIDDK)
North American Society for Pediatric Gastroenterology, Hepatology & Nutrition
Thomson Healthcare
American Journal of Obstetrics and Gynecology
PubMed
UNC Healthcare
Society of Gastroenterology Nurses & Associates
BaiSheDent
Wound, Ostomy & Continence Nurses Society