RT Journal Article SR Electronic T1 Presymptomatic diagnosis. A study in a country practice. JF The Journal of the Royal College of General Practitioners JO J R Coll Gen Pract FD British Journal of General Practice SP 237 OP 246 VO 17 IS 81 A1 S. M. Evans A1 E. Wilkes A1 D. Dalrymple-Smith YR 1969 UL http://bjgp.org/content/17/81/237.abstract AB