Sparrow Group
Department of Biology
University of York
Heslington
York Y01 5DD
United Kingdom

Tel: 44 - 904 - 43 - 2826
FAX: 44 - 904 - 43 - 2860
JCS1@unix.york.ac.uk
DCSW1@unix.york.ac.uk (Of course this doesn't mean David's in John's lab!!)