| http://www.w3.org/ns/prov#value | - The bi-layer core 1 includes a layer having a water soluble therapeutic agent or pharmaceutically active substance and excipients, also interchangeably referred to herein as the ???active layer??? 3, and a layer including a substance that swells under the influence of water, also interchangeably referred to herein as the ???osmotic layer??? 4.
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