At 7 sites, in Portugal, a total of 207 subjects will be randomized using a 1:1:1 randomization ratio to receive one of the three possible treatments for a maximum period of 28 days or until 5 days after total remission of the signs and symptoms, but never more than 28 days. Assessments will be made of level of improvement of the target area in each treatment group, number of days for total remission, and safety profile.