College of Nursing, Ewha Womans University, Seoul, South Korea (Ms Park and Dr Park); and Department of Nursing, KyungBok University, Gyeonggi-do, South Korea (Dr Bang).

Correspondence: Hyojung Park, PhD, College of Nursing, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemoon-gu, Seoul 03760, South Korea ([email protected]).

The authors appreciate the help and contributions from patients participating in this trial.

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The authors have disclosed that they have no significant relationships with, or financial interest in, any commercial companies pertaining to this article.