00460nas a2200181   4500000000100000000000100001008004100002100001700043700001300060700001700073700001800090700001600108700002000124245010200144300001100246490000700257022001400264       2013                            d1 aS. Brilleman1 aS. Purdy1 aC. Salisbury1 aF. Windmeijer1 aH. Gravelle1 aS. Hollinghurst00aImplications of comorbidity for primary care costs in the UK: a retrospective observational study  a274-820 v63  a0960-1643