<qa>  What is the weighed product?Participants will show up to the clinic, for treatment, during 42 consecutive days, when one of the investigational products according to the randomization will be applied by a blind member of the study staff. A non-blind member of the study staff will weigh the corresponding investigational product and pass on to the blind member only a spatula with the weighed product, in order to maintain the blinded aspect of the trial. 