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Advances in Pharmacological Sciences
Volume 2013 (2013), Article ID 192408, 11 pages
Preparation and Evaluation of Intravaginal Ring Containing Drospirenone
1Research Center of Biomaterial and Novel Drug Delivery Systems, National Research Institute for Family Planning, No. 12 Da Hui Si Haidian District, Beijing 100081, China
2Chinese Academy of Medical Science and Peking Union Medical College, No. 9, Dongdan No. 3 Avenue, Beijing 100730, China
Received 11 September 2012; Revised 30 November 2012; Accepted 5 December 2012
Academic Editor: Abdelwahab Omri
Copyright © 2013 Ying Zhang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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