RT Journal Article SR Electronic T1 Estimating sample sizes for studies using the SF-36 health survey. JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 473 OP 474 DO 10.1136/jech.50.4.473 VO 50 IS 4 A1 Prieto, L A1 Alonso, J A1 Antó, J M YR 1996 UL http://jech.bmj.com/content/50/4/473.abstract AB