Case Study: Contact immunotherapy in alopecia areata Therapeutic options for alopecia areata are limited, but this innovative approach involved using a potent contact allergen, topical diphencyprone by Dr Eimear O'Brennan, Dr Anton B Alexandroff and Dr Peter E Hutchinson Sign in to continue Sign In Email address Password Stay signed in Trouble signing in? Reset password: Click here Need help? Email us Register FREE Limited free articles a month Free email bulletins Register Now Register Now Take a 30-day trial Join MIMS now and pay nothing for the first 30 days Join GPOnline now and pay nothing for the first 30 days Sign Up Sign Up