TY - CONF T1 - How do respondents perceive health state valuation tasks? A 'think aloud' study investigating time trade off and discrete choice experiments JO - QUALITY OF LIFE RESEARCH PY - 2012/10/01 AU - Mulhern B AU - Tsuchiya A AU - Brazier JE AU - Rowen D ED - VL - 21 SP - 53 EP - 53 Y2 - 2024/12/21 ER -