Complementary Medicine, Peninsula Medical School, Universities of Exeter and Plymouth, Exeter, UK

Correspondence to E. Ernst, Complementary Medicine, Peninsula Medical School, Universities of Exeter and Plymouth, 25 Victoria Park Road, Exeter EX2 4NT, UK

Tel: +44 (0)1392 424989; fax: +44 (0)1392 427562;

e-mail: [email protected]