Trial design
This study was conducted as a prospective, two-armed, assessor-blinded, parallel-group, pilot randomised controlled trial (RCT) with an allocation ratio of 1:1. A qualitative interview of the experimental group was conducted after the pilot RCT. This trial was conducted between Jun 2020 and Feb 2021, and it has been retrospectively registered with ClinicalTrial.gov (31/12/2020, NCT04690985).