RT Journal Article SR Electronic T1 Mouth to mouth respiration JF The Journal of the Royal College of General Practitioners JO J R Coll Gen Pract FD British Journal of General Practice SP 123 OP 124 VO 22 IS 115 A1 A. S. Playfair YR 1972 UL http://bjgp.org/content/22/115/123.2.abstract AB