Judgment of the Court (Fifth Chamber) 11 July 2002 in Case C-294/00 (Reference for a preliminary ruling from the Oberster Gerichtshof): Deutsche Paracelsus Schulen für Naturheilverfahren GmbH v Kurt Gräbner (Freedom of establishment — Freedom to provide services — Scope of Directive 92/51/EEC — National legislation reserving medical practice, including the activities which Heilpraktikers are permitted to pursue in Germany, to qualified doctors — National legislation restricting medical training to certain institutions and prohibiting advertising for such training)