Laboratory of Molecular Biology, Cambridge, U.K.

Laboratory of Molecular Biology, Cambridge, U.K.

MRC Human Genetics Unit, Edinburgh, U.K.

Institute of Biochemistry II, Frankfurt, Germany

CRUK Manchester Institute Manchester, U.K.

Whitehead Institute, Cambridge MA, U.S.A.

Institute of Molecular Biology, Mainz, Germany

GlaxoSmithKline

MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh