Correction to: Juvenile idiopathic arthritis in Harlequin ichthyosis, a rare combination or the clinical spectrum of the disease? Report of a child treated with etanercept and review of the literature - Francesco Baldo; Michela Brena; Simone Carbogno; Francesca Minoia; Stefano Lanni; Sophie Guez; Antonella Petaccia; Carlo Agostoni; Rolando Cimaz; Giovanni Filocamo (BMC, 2021)