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  1. Joanna Chikwe,
  2. Shinobu Itagaki
  1. Department of Cardiothoracic Surgery, The Mount Sinai Medical Center, New York, New York, USA
  1. Correspondence to Dr Joanna Chikwe, Department of Cardiothoracic Surgery, Mount Sinai Medical Center, 1190 Fifth Avenue, New York, NY 10029, USA; Joanna.chikwe{at}

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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, …

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  • Contributors JC and SI: Drafting and critical revision of the manuscript.

  • Competing interests None.

  • Provenance and peer review Commissioned; internally peer reviewed.

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