CORRESPONDENCE.

Autor: Usher, Alan, Cook, Richard C.M., Evans, Ralph C., Goodall, Janet, Sanders, R. Keith M., Fowler, A.W., Millar, G.T., Freedman, Freda, Harvey, K.C., Juel-Jensen, B.E., Klapper, P.E., Longson, M., Schofield, Philip F., Mandal, Bibhat K., Masterton, George, Hicks, C.A., Finch, Roger, Burnham, W.R.

Publikováno v: British Medical Journal (Clinical Research Edition); 12/5/1981, Vol. 283 Issue 6305, p1542, 10p, 1 Black and White Photograph, 2 Charts