Without prejudice to the provisions of law no. 78-17 of 6 January 1978 on data processing, data files and individual liberties, the creation and use for commercial canvassing or promotional purposes of files composed from data derived directly or indirectly from medical prescriptions or medical information mentioned in article L. 161-29 of the Social Security Code is prohibited, where these files enable the prescribing professional to be identified directly or indirectly.