M. Johnson

发表

A. Simonds, S. Clarke, S. Newman, 1990, The American review of respiratory disease.

A. Simonds, S. Clarke, S. Newman, 1989, The Lancet.

J. Elford, L. Sherr, J. Norton, 1998, Sexually transmitted infections.

L. Young, I. Bevan, R. Tucker, 1989, The Lancet.

C. Woodman, L. Young, I. Bevan, 1989, The Lancet.

P. Griffiths, V. Emery, C. Lee, 1994, The Lancet.