Judgment of the Court (Sixth Chamber) of 8 May 2003 in Case C-15/01 (Reference for a preliminary ruling from the Regeringsrätten ): Paranova Läkemedel AB and Others v Läkemedelsverket (Interpretation of Article 28 EC and Article 30 EC — Medicinal products — Withdrawal of parallel import licence in consequence of waiver of the marketing authorisation for the medicinal product of reference by the holder of that authorisation)