1. Drake LA, Ceiley RI, Dorner W, et al. Guidelines of care for 23. phototherapy and photochemotherapy. J Am Acad Dermatol 1994; 31: 643–8.
2. Habif TP. Clinical dermatology: a color guide to diagnosis and 24. therapy, 3rd ed. St. Louis: Mosby, 1996; 211–27.
3. Potter B. Hydroxychloroquine. Cutis 1993; 52: 229–31.
4. Brainard BJ. Managing corns and plantar calluses. Phys Sportsmed 1991; 19: 61–7.
5. Habif TP. Clinical dermatology: a color guide to diagnosis and therapy. 3rd ed. St. Louis: Mosby, 1996; 765–9.