Randomization and blinding
BLIND
All participants meeting inclusion criteria were selected and allocated into four groups by using the computer-generated random sequence (simple randomization) and set in a sealed envelope before baseline assessment. The therapist will communicate the grouping assigned to the participants. Due to the nature of the intervention, it is not possible to blind either the therapist or the participant. Evaluators unaware of the group assignment will perform outcome measurements at all time points. Data entry and statistical analysis will be performed without knowledge of the interventions. The random plan was only known to the project leader. Consistent with the Declaration of Helsinki, all participants provided signed written informed consent.