Catherine Fernandez , Katherine Clark, Louise Burrows, Neil R. Schofield, Martin J. Humphries

School of Biological Sciences, University of Manchester, Room 2.205 Stopford Building, Oxford Road, Manchester M13 9PT

Received 5/27/98 Accepted 6/8/98

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Professor Martin J. Humphries
School of Biological Sciences
University of Manchester
Room 2.205 Stopford Building
Oxford Road
Manchester, M13 9PT. United Kingdom

Tel: 0161 275 5071,
Fax: 0161 275 5071
E-mail:
mhumphri@fs1.scg.man.ac.uk,
cfernand@fs1.scg. man.ac.uk (Tel. No. 0161 275 5649),
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mhumphri@fs1.scg.man.ac.uk (Tel. No./Fax No. 0161 275 5071)