Correction to: Trials 18, 528 (2017)

https://doi.org/10.1186/s13063-017-2270-3

Following the publication of the original article [1], we were notified that that the last name of the third author was incorrect.

  • Originally published name: Rosanna W. L. Lam

  • Corrected name: Rosanna W. L. Lau

The original article has been corrected.