3838995 EGCG-NPs EGCG nanoparticles 2 3838997 EGCG-NPs EGCG loaded PLGA nanoparticles 1 3838999 EGCG-NPs EGCG-casein nanoparticles 1 3838998 EGCG-NPs PEG-PLGA-EGCG nanoparticles 1