1954
PURPOSE : Heparin immobilized porous poly ( D , L - lactic - co - glycolic acid ) ( PLGA ) microspheres were prepared for sustained release of basic fibroblast growth factor ( bFGF ) to induce angiogenesis .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
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