1Wu YN, Meng WJ, Liu YY, et al. Preparation and in vitro evaluation of gelatin microspheres for embolization [ J ]. Journal of Chinese Pharmaceutical Scinence ,2012,21 ( 2012 ) :242 - 250.
2Nanjawade BK,Manvi FV,Manjappa AS. In situ-forrning hy- drogels for sustained ophthalmic drug delivery [ J ]. J Con- trolled Release,2007,122 ( 2 ) : 119-134.
3Desai SD, Blanchard J. In vitro evaluation of pluronic F127- based controlled release ocular delivery systems for pilocarpine [J]. J Pharm Sci,1998,87(2) :226.