00430nas a2200169   4500000000100000000000100001008004100002100001700043700001200060700001400072700001600086700001400102245009500116300001000211490000700221022003200228       2000                            d1 aR. Lawrenson1 aJ. Todd1 aG. Leydon1 aT. Williams1 aR. Farmer00aValidation of the diagnosis of venous thromboembolism in general practice database studies  a591-60 v49  a0306-5251 (Print) 0306-5251