by Leff, S
Published in Journal of public health medicine (01.03.1993)

by Acharyya, S., Leff, Sonya
Published in BMJ (05.08.2000)

by LEFF, SONYA
Published in Archives of disease in childhood (01.01.1999)

by Leff, Sonya
Published in Public health (London) (01.03.1991)

by Leff, Sonya
Published in Public health (London) (01.11.1989)

by Leff, Sonya
Published in BMJ (17.04.1999)

by Leff, S
Published in BMJ (26.01.1991)

by Leff, Sonya
Published in Public health (London) (01.07.1986)

by Leff, Sonya
Published in Public health (London) (01.03.1986)

by Leff, Sonya
Published in BMJ (13.11.1993)

by Leff, Sonya
Published in Public health (London) (1982)

by Leff, Sonya
Published in Postgraduate Medical Journal (01.09.1988)

by Macfarlane, Aidan, Leff, Sonya, Swanke, Jean K.
Published in Public health (London) (01.07.1986)

by Leff, Sonya
Published in BMJ (17.06.1989)

by Tamhne, Rashmin C., Leff, Sonya, Tewson, Jocelyn, Summerfield, Derek, McFadyen, Anne, Roberts, Jane, Sloan, David
Published in BMJ (02.08.1997)

by Markham, Gillian, Welsh, C. L., Nicolson, Paula, Bynoe, A. Geraldine, Davies, Tim, Lachmann, Peter J., Leff, Sonya, Glass-Crome, Ilana B., Crome, Peter
Published in BMJ (Online) (13.11.1993)