The present invention relates to a composition for the modulated release of a biologically active agent. The composition comprises a biocompatible polymeric matrix, a biologically active agent which is dispersed within the polymeric matrix, and a metal cation component which is separately dispersed within...http://www.google.com.au/patents/US6749866?utm_source=gb-gplus-sharePatent US6749866 - Modulated release from biocompatible polymers
