1. 2) Blacker KL, Stern RS, Wintroub BU: Cutaneous reactions to drugs; in Dermatology in General Medicine, 4th ed (Fitzpatrick TB et al ed), McGraw-Hill Inc, New York, 1993, 1783-1795.
2. 3) Horn T: Cutaneous toxicities of drugs; in Lever's Histopathology of the Skin, 8th ed (Elder D et el ed), Lippincott-Raven Publishers, Philadelphia, 1997, 287-303.
3. 4) Goldstein SM, Wintroub BU: The cellular and molecular biology of the human mast cell; in Dermatology in General Medicine, 4th ed (Fitzpatrick TB et al ed), McGraw-Hill Inc, New York, 1993, 359-373.
4. 5) Tomita Y, Maeda K, Tagami H: Histamine stimulates normal human melanocytes in vitro: one of the possible inducers of hyperpigmentation in urticaria pigmentosa. J Dermatol Sci 6: 146-154, 1993.