1. Department of Clinical Pharmacology and Therapeutics; University of Dundee, Ninewells Hospital and Medical School; Dundee DD1 9SY Scotland UK
2. Department of Cardiology; University of Dundee, Ninewells Hospital and Medical School; Dundee DD1 9SY Scotland UK
3. The Medical Centre; Arbroath Scotland UK
4. Medicines Monitoring Unit; University of Dundee, Ninewells Hospital and Medical School; Dundee DD1 9SY Scotland UK