RT Journal Article SR Electronic T1 Evaluation of screening tests for unreported disability in the elderly. JF British Journal of Preventive & Social Medicine JO Br J Prev Soc Med FD BMJ Publishing Group Ltd SP 55 DO 10.1136/jech.26.1.55 VO 26 IS 1 A1 J Chamberlain YR 1972 UL http://jech.bmj.com/content/26/1/55.1.abstract AB