Judgment of the Court of 18 May 1989 in Cases 266 and 267/87 (references for a preliminary ruling made by the Court of Appeal of England and Wales): The Queen v. Royal Pharmaceutical Society of Great Britain, ex parte the Association of Pharmaceutical Importers and Others and The Queen v. Secretary of State for Social Services, ex parte the Association of Pharmaceutical Importers and Others (Pharmaceutical products — Parallel imports — Measures having equivalent effect — Protection of public health — Trade mark law)