RALGA - the First Association of Retinaldehyde and Glycolic Acid : A New Compound for the Acne Patient with Depigmenting PropertiesSatellite Symposium Held at the 12th Congress of the EADV, Barcelona, October 2003Supplement Issue by W. J. Cunliffe, B. Dréno, A. Katsambas, H. Gollnick, J. -H Saurat