TY - JOUR T1 - Sample sizes for the SF-6D preference based measure of health from the SF-36: A comparison of two methods JO - Health Services and Outcomes Research Methodology PY - 2003/01/01 AU - Walters SJ AU - Brazier JE ED - DO - DOI: 10.1023/A:1025876827228 VL - 4 IS - 1 SP - 35 EP - 47 Y2 - 2025/05/02 ER -