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. 2019 Nov 13;5(11):eaay6484. doi: 10.1126/sciadv.aay6484

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Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

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Fig. 1 — TEM images of crystal morphologies, with insets showing size distribution (A and D), XRD patterns (B), IR spectra (C), XPS spectra (E), and cell proliferation effects (F) of HA and HA-Tb nanocrystals. (*versus control, ^versus HA for P < 0.05). ICDD, the International Centre for Diffraction Data; a.u., arbitrary units.