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Correction
November 11, 2009

Incorrect Percentage and Number in: The Journal Impact Factor Denominator: Defining Citable (Counted) Items

JAMA. 2009;302(18):1972. doi:10.1001/jama.2009.1635

Incorrect Percentage and Number: In the Commentary entitled “The Journal Impact Factor Denominator: Defining Citable (Counted) Items” published in the September 9, 2009, issue of JAMA (2009;302[10]:1107-1109), an incorrect percentage and number appeared on page 1108, in the Table. Under the column 1 subheading, “Total citations by end of 2007,” row 4 for “JAMA,” column 4 that reads “4916 (22.9)” should have read “4916 (11.9).” In the same section of the table, row 6 for “NEJM,” column 4 that reads “75 984 (9.2)” should have read “6963 (9.2).”

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