What is your preferred protocol for squaric acid (SADBE) treatments for alopecia areata/totalis?  

Based on a few series published showing that sensitization is not necessary for contact immunotherapy, I tend to do one of two things: Start patients at squaric acid 0.001% solution every other day at home and increase the concentration by 10 (0.01%, then 0.1%, then 0.5%) monthly if not reacting....