A Randomized, Double-Blind, Placebo-Controlled Trial: Efficacy of <i>Opuntia ficus</i>-<i>indica</i> Prebiotic Supplementation in Subjects with Gut Dysbiosis oleh Marta Mellai, Marta Allesina, Benedetto Edoardo, Federica Cascella, Vincenzo Nobile, Amelia Spina, Fabio Amone, Vincenzo Zaccaria, Violetta Insolia, Anna Perri, Danilo Lofaro, Francesco Puoci