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Comment
. 2019 Apr 17:365:l1720.
doi: 10.1136/bmj.l1720.

Seven electrocardiographs for seven clinical research studies

John R Zalcberg  1
Affiliations
Comment

Seven electrocardiographs for seven clinical research studies

John R Zalcberg. BMJ. .
No abstract available

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Conflict of interest statement

Competing interests: None declared.

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