PROMM and deafness: exclusion of ZNF9 as the disease gene in DFNA18 suggests a polygenic origin of the PROMM/DM2 phenotype - Bonsch, D; Neumann, C; Lang-Roth, R; Witte, O; Lamprecht-Dinnesen, A; Deufel, T (Clin Genet, 2003)