Erratum
ERRATUM: Vol. 60, No. 4, December 1992:Correspondence by Corcos. Page 660, line26 should read: "computer simulations ofmolecular events..." .Line 31 should read: "terminants (9)". Line 45 should read:"Lancet, Emery (4) reported that very few ..."
First author should be: Christopher D. Corcos, M.B.B.S., % Postgraduate Center, West Middlesex University Hospital, Twickenham Road, Isleworth, Mid dlesex TW7 6AF, U.K. Second author should be: Michael J. Corcos, M.R.C.S., L.R.C.P., D.T.M. & H., 6 Grange Avenue, Beeston, Nottingham NG9 1GJ, U.K.