RT Journal Article SR Electronic T1 Letter: The distribution of episodes of illness. JF The Journal of the Royal College of General Practitioners JO J R Coll Gen Pract FD British Journal of General Practice SP 357 OP 358 VO 26 IS 166 A1 Russell, I. T. YR 1976 UL http://bjgp.org/content/26/166/357.1.abstract AB