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. 2005 Jan 10;113(4):396–401. doi: 10.1289/ehp.7333

Figure 4. Thyroid follicles (f) in close proximity to the ventral aorta (va) and gills (g) of fathead minnows exposed to ammonium perchlorate from day 0 to day 28. (A) Control. (B) 1 mg/L ammonium perchlorate. (C) 10 mg/L ammonium perchlorate. (D) 100 mg/L ammonium perchlorate. Bars = 100 μm.

Figure 4