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Silver quantification using ICP-MS in the lung tissue following exposure. The amount of silver retained in the right middle lobe at 1, 7, 21, and 56 days post-exposure (C). Asterisk (*), significantly less than T0 time-point for same particle type (P < 0.05); dagger (†), significantly less than T0 and T1 time-point for same particle type (P < 0.05) (n = 6).
