Lee SMK, Leem J, Park JH, *et al.*  Close look at the experiences of patients enrolled in a clinical trial of acupuncture treatment for atrial fibrillation in Korea: a qualitative study nested within a randomised controlled trial. * BMJ Open* 2017;7:e013180.  doi: 10.1136/bmjopen-2016-013180

There should be two Corresponding authors.  Both Sanghoon Lee and Weon Kim should be considered the Corresponding authors for this paper.  The Correspondence section should read:

**Correspondence to**

Dr Sanghoon Lee; <shlee777@gmail.com>

and

Weon Kim; <mylovekw@hanmail.net>
