HAROLD L. KENNEDY, M.D.
To the editor: A "natural history" follows the introduction of a new or innovative diagnostic technology as reported in the medical literature and may be described as follows:  initial reports exploring potential applications of the technology;  enthusiasts seeking and reporting advantages and usefulness of the new technology;  objective reports of the limitations or errors of such technology; and  correct clarification of the technology with regard to its indications, limitations, and adjunctive value for the practicing clinician. It seemed that the recent article by Crawford and associates (1) would contribute data to the third step of the
HAROLD L. KENNEDY. Ambulatory Electrocardiography. Ann Intern Med. 1979;90:124–125. doi: 10.7326/0003-4819-90-1-124
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Published: Ann Intern Med. 1979;90(1):124-125.
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