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Trends in ACDF procedure volume over time by participating sites from the NSQIP database from 2006 to 2016. (A) Sites indicate number of participating health care sites in the ACS-NSQIP database. (B) %ACDF indicates percentage of procedures coded as ACDF procedures compared with all procedures in the ACS-NSQIP. ACDF, anterior cervical discectomy and fusion; NSQIP, National Surgical Quality Improvement Program database; ACS, American College of Surgeons.
