Expression of concern: The effect of metal ions on endogenous melanin nanoparticles used as magnetic resonance imaging contrast agents

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Biomater. Sci., 2025, Advance Article
DOI: 10.1039/D5BM90061A, Expression of Concern

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&nbsp This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.

Anqi Chen, Jinghua Sun, Shijie Liu, Liping Li, Xiaoyang Peng, Lixin Ma, Ruiping Zhang
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