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Abnormally increased pigmentation of the gums in a child treated with a lead-based folk medicine

Abnormally increased pigmentation of the gums (“lead line” or "Burton line") in a child treated by a traditional Chinese medicine practitioner (Shenzhen, Guangdong, China) with a lead-based folk medicine. (Source: Ying XL, Markowitz M, Yan CH. Folk prescription for treating rhinitis as a rare cause of childhood lead poisoning: a case series. BMC Pediatr 2018;18[1]:219. Creative Commons Attribution 4.0 International License, http://creativecommons.org/licenses/by/4.0.)

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