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Cellular iron content and physiology for labeled and unlabeled cells. Cellular iron content for a) slow dividing MSCs and b) fast dividing STOs as a function of time and particle type. Cell viability for c) slow dividing MSCs (* = p < 0.05) and d) fast dividing STOs as a function of time and particle type. ROS production for e) macrophages and f) STOs as a function of time and particle type. Data are means +/− SEM.
