Institution: | aDepartment of Physics and Applied Physics, Strathclyde University, John Anderson Building, 107 Rottenrow, Glasgow G4 ONG, UK;bZeneca Pharmaceuticals, Mereside, Alderley Park, Macclesfield, Cheshire SK10 4TG, UK;cZeneca Specialities, P.O. Box 42, Hexagon House, Manchester M9 3DA, UK |