GJB2 and hearing impairment: promoter defects do not explain the excess of monoallelic mutations. Issue 9 (1st September 2008) - Pollak, A; Mueller-Malesińska, M; Skórka, A; Kostrzewa, G; Ołdak, M; Korniszewski, L; Skarżyński, H; Ploski, R