TNNT2 and Danon disease: Among the remaining 5 patients, 1 individual received a diagnosis of Fabry disease, another patient was diagnosed with Danon disease, another patient was diagnosed with a novel FHL1 (HGNC:3702, NM_001159699.2)-related X-linked HCM with X inactivation, 1 patient was diagnosed with a novel ALPK3 (HGNC:17574, NM_020778.4)-related HCM, whereas another was diagnosed with TNNT2 (HGNC:11949, NM_001276345.2)-related HCM, which is notably more prevalent in the local population.