Incomplete Reference.

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—In the letter to the editor entitled "Mitral Valve Proplapse" published in the July 1992 issue of AJDC (1992;146:786-787), issue numbers should have been given for references 6 and 8. The article cited as reference 6 can be found in issue 11 of Hospital Physician, and the article cited as reference 8 can be found in issue 7 of Postgraduate Medicine.