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American Association of Neurological Surgeons
American Pediatric Surgical Association
American Society of Transplantation
American Surgical Association
Association of Women Surgeons
Cold Spring Harbor Laboratory
Medical Center
East Carolina University (ECU)
ClinicalTrials.gov
Society of Critical Care Medicine
Directory of Open Access Journals
BioMed Central
BMJ
MedlinePlus
No Pub/Vend Assigned
Medscape
BroadcastMed, Inc.
PubMed
UNC Healthcare
Society for Vascular Surgery
Society of Thoracic Surgeons, The
Trauma.org, UK
