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. 2023 May 25;138(1):123–137. doi: 10.1007/s00414-023-03021-1

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Fig. 5 — A, B Summary histogram of the average values obtained from the 4 samples (with hair, without hair, in contact, and exposed) of proper elements (positive value) and contaminants (negative value) for each time observed with each of the four survey techniques. In green the total value obtained from each environment (sum of the scores of all elements observed on the control samples placed in the same environment)