RT Journal Article SR Electronic T1 Linking questionnaires to primary care records: factors affecting consent in older people JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 336 OP 338 DO 10.1136/jech.2004.025296 VO 59 IS 4 A1 Harris, Tess A1 Cook, Derek G A1 Victor, Christina A1 Beighton, Carole A1 DeWilde, Stephen A1 Carey, Iain YR 2005 UL http://jech.bmj.com/content/59/4/336.abstract AB