@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 = {{http://eprints.whiterose.ac.uk/22/ }}, 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 2025/05/31}}}