Correction to: Trials 22, 566 (2021)

https://doi.org/10.1186/s13063-021-05529-6

Following the publication of the original article [1], we were notified that the first affiliation of the first author was incorrect.

  • Originally published affiliation: School of Nursin, Shandong First Medical University (Shandong Academy of Medical Sciences), Jinan 250000, Shandong, China

  • Corrected affiliation: School of Public Health, Xinxiang Medical University, Xinxiang 453003, Henan, China

The original article has been corrected.