REFERENCES
- Fitzpatrick, TB, Eisen, AZ, Wolff, K, Freeberg, IM and Austen, KF. Dermatology in General Medicine. 2nd edition, New York : McGraw‐Hill, 1979.
- Hall‐smidi, P and Cairns, RJ. Dermatology: Current concepts and practice. 3rd edition, London : Butterworths, 1981.
- Rook, A, Wilkinson, DS, and Ebling, FJG. Textbook of Dermatology. 4th edition. Oxford : Blackwells Scientific Publications, 1986.