Due to an error in printing, the symbol for "grade present" in Figure 1 of the paper by Kennedy and associates (1) in the February issue appeared as a white rectangle in the key to the illustration. This symbol should have appeared as a shaded rectangle, to correspond to the shaded areas in the grid at the bottom of the figure.
Correction: Symbol in Coronary Artery Status Figure. Ann Intern Med. ;92:723. doi: 10.7326/0003-4819-92-5-723_2
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Published: Ann Intern Med. 1980;92(5):723.
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