Uniparental disomy of chromosome 13q causing homozygosity for the 35delG mutation in the gene encoding connexin26 (GJB2) results in prelingual hearing impairment in two unrelated Spanish patients. Issue 8 (14th August 2003) - Álvarez, A; del Castillo, I; Pera, A; Villamar, M; Moreno-Pelayo, M A; Rivera, T; Solanellas, J; Moreno, F