The APCDG-DMR in association with CDG & Allies Professionals and CDG & Allies - PPAIN will organize from 13 to 16 of may 2021 the 5.th World Conference on Congenital Disorders of Glycosylation (CDG), for the first time, on an hybrid formula: virtual and face-to-face. The initiative will count with the participation of about 120 international speakers from all around the globe.