For example, the level of alanine transaminase (ALT) in CeD and the effect of a GFD were examined in a cohort of US adult patients, including 463 subjects with biopsy-proven CeD tested at the time of CeD diagnosis and on a GFD (mean duration of 1.5 years) and 7789 matched non-CeD controls [27]. Here, GPT is linked to cranioectodermal dysplasia.