By Alastair H. Fitter (University of York, U.K.), Robert K.M. Hay (Scottish Agricultural Science Agency, EDINBURGH, Scotland)
By Micheal J. Browne (SmithKline Beecham Pharmaceticals, Harlow, Essex, U.K.), P. L. Thurlby (SmithKline Beecham Parmaceuticals, New Frontiers Science Park, Essex)
By Frances M. Ashcroft (University of Oxford, U.K.)