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Walker WA, Tarannum M, Vivero-Escoto JL.Walker WA, et al.J Mater Chem B. 2016 Feb 21;4(7):1254-1262. doi: 10.1039/C5TB02079D. Epub 2016 Jan 7.J Mater Chem B. 2016.PMID: 27134749Free PMC article.