Individualized Medical Training and Calcipotriol and Betamethasone Dipropionate Gel in Plaque Psoriasis

The aim of the study will be to evaluate the impact of this individualized practical training on efficacy (evaluated by Psoriasis Area and Severity Index (PASI) and Body Surface Area (BSA) score performed by a physician blinded to the study groups) and adherence (calculated as days wherein gel was applied and as BSA/weight of gel applied rate) to a 4 week long treatment with dovobet gel. On the other hand, the investigators will evaluate in both groups as demographic (as sex, age, job,..) or disease (as severity, duration, impact of quality of life,..) characteristics influence the adherence to the treatment.