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. 2021 Dec 22;12:788779. doi: 10.3389/fpsyt.2021.788779

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Copyright © 2021 Harutyunyan, Harutyunyan and Yenkoyan.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Linear regression analysis (Pearson product-moment correlation). Association between lead poisoning and precoproporphyrin appearance in urine of ASD patients. (A) The interrelation between precoproporphyrin and lead content (r = −0.4145; p < 0.2050). (B) The interrelation between monocytes count in blood and lead content (r = −0.7154; p = 0.0089). (C) The interrelation between precoproporphyrin and monocytes count in blood (r = 0.7108; p = 0.0142). Pearson correlation coefficients were computed to determine inter-metabolite correlations. P < 0.05 were used to indicate statistical significance.