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Chemical yields calculated from the six different dose response studies performed on x-ray irradiated nail clippings from six volunteers. The error bars represent the standard error of the estimate. Nail masses used in these studies are as follows: Vol. 1 (8.9 mg), Vol. 10 (10.2 mg), Vol 12 (12.0 mg), Vol. 13 (10.4 mg), Vol. 14 (10.1 mg) and Vol. 15 (10.1 mg).
