Patients were informed about the study and informed consent
was obtained. After completion of the study, all participants in the
control group received an educational pamphlet and a DVD, containing
Tai Chi music and exercises. The research proposal was
submitted to the Iranian Registry of Clinical Trials and received due
ID (2013; Registration ID: IRCT2013021312466N1). The University
of Social Welfare and Rehabilitation Sciences' ethical review board
approved this study.