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This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
Extensive deposition of nanosized particles was seen in the left ventricular exposed myocardial endoplasmic reticulum of a Mexico City dog (in the inset, arrows point to the nanosized PM in the ER), EM magnifications ×50,000 and 120,000.