[1] SmithKline Beecham Pharmaceut, Dept Mol Screening Technol, Harlow CM19 5AW, Essex, England
[2] SmithKline Beecham Pharmaceut, Dept Mol Biol, Harlow CM19 5AW, Essex, England
[3] SmithKline Beecham Pharmaceut, Dept Comparat Genet, Harlow CM19 5AW, Essex, England
[4] SmithKline Beecham Pharmaceut, Dept Cardiovasc Pharmacol, Harlow CM19 5AW, Essex, England