RT Journal Article SR Electronic T1 21st century health services for an ageing population: 10 challenges for general practice JF British Journal of General Practice JO Br J Gen Pract FD British Journal of General Practice SP 396 OP 397 DO 10.3399/bjgp12X653435 VO 62 IS 601 A1 David Oliver YR 2012 UL http://bjgp.org/content/62/601/396.abstract AB