ABCD1 and X-linked adrenoleukodystrophy: More than 800 ABCD1 pathogenic and likely pathogenic variants are cataloged in the Human Gene Mutation Database [7] and in the specific ALD Variant Database [8] (available online at https://adrenoleukodystrophy.info/mutations-and-variants-in-abcd1, accessed on 15 February 2023).