LETTERS.

Autor: Noonie, Ahilya, Macdonald, Neil, Evans, Barry, Heptonstall, Julia, Channon, K.M., Cripps, T.R., Ormerod, O., Banning, A.P., Gavery, P., McGurk, Lynda A., Fraser, A.G., Buchalter, Maurice, Sutton, Richard, Perrins, John, Clarke, Malcolm, Cobbie, Stuart M., Charles, Richard G., Edward, David

Publikováno v: BMJ: British Medical Journal (International Edition); 12/5/92, Vol. 305 Issue 6866, p1431, 8p, 2 Charts