1. Department of Dermatology and Wound Healing; Institute of Infection and Immunity; School of Medicine; Cardiff University; 3rd Floor, Glamorgan House, Heath Park Cardiff CF14 4XN U.K.
2. Department of Dermatology; University Malaya Medical Centre; Kuala Lumpur 50603 Malaysia
3. School of Life and Medical Sciences; University of Hertfordshire; College Lane Hatfield AL10 9AB U.K.