CORRESPONDENCE.

Autor: Black, David, Murphy, James D., Newburn, Mary, hardy, P.A.J., MacArthur, C., Knox, E.G., Lewis, M., Whittle, I.R., Smith, Alwyn, Roberts, Graham J., Douglas, A.S., Eagles, J.M., Mowat, N.A.G., Maclennan, Alexander C., Stewart, D. Graeme, Wood, Rosemary J., Fortser, Greta E., Hool, Y.S.

Publikováno v: BMJ: British Medical Journal (International Edition); 8/18/90-8/25/90, Vol. 301 Issue 6748, p385, 6p, 1 Black and White Photograph, 1 Chart