Order of the President of the Court of First Instance of 18 April 2000 in Cases T-83/00 R I, T-83/00 R II, T-84/00 R and T-85/00 R: Hänseler GmbH and Others v Commission of the European Communities (Proceedings for interim relief — Withdrawal of authorisation for the placing on the market of medicinal products for human use containing the substance "norpseudoephredin" — Directive 75/319/EEC — Suspension of operation of a measure pending the making of the order bringing the proceedings for interim relief to a close)