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When a clear crystal makes a case crystal clear.
Benz R, Züger M, Pung T, Gallus E, Weisshaupt C, Krause M. Benz R, et al. Among authors: gallus e. Pract Neurol. 2009 Dec;9(6):345-6. doi: 10.1136/jnnp.2009.193839. Pract Neurol. 2009. PMID: 19923115 No abstract available.