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American Academy of Orthopaedic Surgeons
American Orthopedic Society for Sports Medicine
No Pub/Vend Assigned
ABOG
Cold Spring Harbor Laboratory
Elsevier
Medical Center
Baptist Medical Center
ClinicalTrials.gov
Directory of Open Access Journals
Rehabilitation Research & Development
PubMed Central
American Journal of Obstetrics and Gynecology
OVID
MedlinePlus
Medscape
PubMed
UNC Healthcare
JAMA
Agency for Healthcare Research & Quality