 A randomized clinical trial performed at five 5 centers Montreal, Laval, Quebec City, Quebec; Markham, London Ontario, Canada. One hundred 100 patients are enrolled in the study. Subjects and parents or guardian are asked to present to the clinic for five 5 visits Screening, D0, D7, D42, D56. Formulation 609580 20 or 609209 is applied twice a day morning and evening to the whole body for a total of 42 days and then there is a crossover between the two formulations. 