1. Alder, V.G., Burman, D., Corner, B.D. and Gillespie, W.A. (1972). Lancet, ii, 384.
2. Alexander, G.M.C. and Pitkewicz, J.S. (1973). Pediatrics, 51, 360. Ayliffe, G.A.J., Brightwell, K.M., Ball, P.M. and Derrington, M.M. (1972). Lancet, ii, 479.
3. Baber, K.G., Corner, B.D., Duncan, E.H.L., Eades, S.M., Gillespie, W.A. and Walker, S.C.B. (1967). J.Hyg., Camb., 65, 381.
4. Catalano, P.M. (1975). Arch.Dermatol., 111, 250.
5. Corner, B.D., Crowther, S.T. and Eades, S.M. (1960). Br.med.J., i, 1927.