Front Cover: Hydrogel-forming microneedles have been primarily utilized for the enhancement of transdermal drug delivery and extraction of interstitial fluid. Applications including treatments for skin cancer and wound healing have been reported. Current applications, hydrogel materials, and potential future directions have been reported in the review article by Joseph G. Turner, Leah R. White, Pedro Estrela, and Hannah S. Leese in the article 2000307. Image Credit: Joseph G. Turner.
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Turner et al. (2021) studied this question.