COL11A1 and Waardenburg syndrome type 1: Patients 14 and 26 were affected by a dual molecular diagnosis: both of them carry a heterozygous variant in a gene associated with NSHL (respectively, ATP2B2—Deafness, autosomal dominant 82, MIM: # 619804, and COL11A1—Deafness, autosomal dominant 37, MIM: # 618533) and a heterozygous variant in a gene associated with Waardenburg syndrome (respectively, EDN3—Waardenburg syndrome type 4, MIM: # 613265, PAX3—Waardenburg syndrome type 1, MIM: # 193500).