Corrigendum: Sleep behavior and daily activity levels in people with metabolic syndrome: effect of 1 year of metformin treatment - Bruno, Eleonora; Mulè, Antonino; Galasso, Letizia; Castelli, Lucia; Baldassari, Ivan; Oliverio, Andreina; Venturelli, Elisabetta; Berrino, Franco; Montaruli, Angela; Roveda, Eliana; Pasanisi, Patrizia (Frontiers in Nutrition, 2023)