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. 2022 Jun 6;27(11):3637. doi: 10.3390/molecules27113637

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Harpagophytum procumbens (Devil’s claw) (A) Devil’s claw plant with pink flowers (SANBI) [44]; (B) H. procumbens tubers; (C) Dried H. procumbens sliced tubers used for plant extracts [27] (D) Devil’s claw (SANBI) [45].