TY - JOUR T1 - Case mix in recruitment to a randomized controlled trial of varicose vein treatment JO - BRIT J SURG PY - 2002/04/01 AU - Michaels JA AU - Campbell WB AU - Palfreyman SJ AU - Rigby K AU - Allington K ED - VL - 89 IS - 4 SP - 507 EP - 507 Y2 - 2024/12/22 ER -