1. Department of Cutaneous Allergy; St John's Institute of Dermatology; Kings College; St Thomas Hospital; London SE1 7EH U.K
2. National Allergy Research Centre, Department of Dermatology and Allergology; Gentofte University Hospital; Hellerup DK 2900 Denmark
3. DABMEB Consultancy Ltd; Sharnbrook Bedfordshire U.K
4. Institute of Dermatology; Bangkok Thailand
5. Faculty of Life Sciences; University of Manchester; Manchester U.K