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Cao T, Yang Y, Gao Y, Zhou J, Li Z, Li F. High-quality water-soluble and surface-functionalized upconversion nanocrystals as luminescent probes for bioimaging. Biomaterials. 2011 Apr;32(11):2959–68. doi: 10.1016/j.biomaterials.2010.12.050. PMID: 21262531. |