TY - JOUR AU - Willke, R J; Burke, L B; Erickson, P TI - Measuring treatment impact: a review of patient-reported outcomes and other efficacy endpoints in approved product labels JO - Control Clin Trials VL - 25 PY - 2004 DO - 10.1016/j.cct.2004.09.003 L3 - PubMed-ID: 15588741 SP - 535 EP - 552 ER -