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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Characteristic structure and elemental composition of particles from salivary gland stones: (a) HAADF STEM image; (b–d) chemical element distribution maps; (e) energy dispersive spectrum.