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The Authors’ reply The question posed by Al-Attar et al 1 in response to our analysis of bilateral internal mammary artery (BIMA) use in the USA using the Nationwide Inpatient Sample2 cannot be answered by this or other national databases as, …
Contributors JC and SI: Drafting and critical revision of the manuscript.
Competing interests None.
Provenance and peer review Commissioned; internally peer reviewed.