“…The definition of CD differs among authors, sometimes including only seroprevalence. Specifically, 10 works were based only on serological results [10,11,18,21,23,25,28,30,31,33] and 13 included a duodenal biopsy after serological screening [9,12,13,14,17,19,20,22,24,26,27,29,32]. It must be also considered that the selected articles were published between 1976 and 2019, and the serological tests used for CD screening vary according to the technological and scientific advances.…”