@article{article, title  = {{Sample size and power estimation for studies with health related quality of life outcomes: a comparison of four methods using the SF-36.}},

 url = {{}},

 year = {{2004}},

 month = {{5}},

 author = {{Walters SJ}},

 doi = {{10.1186/1477-7525-2-26}},

 volume = {{2}},

 journal = {{Health Qual Life Outcomes}},

 pages = {{26}},

 note = {{Accessed on 2025/10/31}}}