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. Author manuscript; available in PMC: 2013 Nov 1.
Published in final edited form as: Adv Drug Deliv Rev. 2012 Feb 21;64(14):1590–1602. doi: 10.1016/j.addr.2012.02.005

Fig. 1.

Fig. 1

Examples of osmotic oral delivery systems, including a) push-pull, b) L-OROS®, and c) Tri-Layer designs. Reproduced with permission from Fig. 2 in [6] (©2005 Nature Publishing Group).