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. 2012 Nov 8;2(11):1064–1077. doi: 10.7150/thno.4181

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© Ivyspring International Publisher. This is an open-access article distributed under the terms of the Creative Commons License (http://creativecommons.org/licenses/by-nc-nd/3.0/). Reproduction is permitted for personal, noncommercial use, provided that the article is in whole, unmodified, and properly cited.

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Representative ultrasound images of the same implant over a period of 10 days for all six formulations examined in this study. Whiter areas represent precipitated polymer while darker areas suggest a mixture of water, solvent and remaining dissolved PLGA. Row 1 is 15 kDa implants, row 2 is 29 kDa implants, row 3 is 53 kDa implants, row 4 is 15kDa:29kDa blend, row 5 is 15kDa:53kDa blend, and row 6 is 29kDa:53kDa blend. Pore is indicated by the arrow.