Quality of life (QOL) will be examined using a World Health Organization Quality of Life Questionnaire (WHOQOF-BREF). The WHOQOL-BREF instrument comprises 26 items, which measure the following broad domains: physical health, psychological health, social relationships, and environment. The WHOQOL-BREF is a shorter version of the original instrument that may be more convenient for use in large research studies or clinical trials [20].
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