1 Subjects: “...X-ray dose rate...”

2 Subjects: “...X-ray dose rate...”

3 Subjects: “...stress growth rate...”

4 Subjects: “...nitrogen deposition...”

5 “...Because of excessive mortality, a second study was conducted using 250, 500, and 1,000 mg/kg...”

6 “...Because of excessive mortality, a second study was conducted using 250, 500, and 1,000 mg/kg...”