RT Journal Article SR Electronic T1 Telephone advice in managing out-of-hours calls JF The Journal of the Royal College of General Practitioners JO J R Coll Gen Pract FD British Journal of General Practice SP 462 OP 462 VO 37 IS 303 A1 Roger Gadsby YR 1987 UL http://bjgp.org/content/37/303/462.2.abstract AB