... loss and 200 region- and race-matchedcontrols with normal hearing using a commercially avail-able DNA extraction kit (Watson Biotechnologies Inc,Shanghai, China).Mutational analysisDNA sequence ... TheUSA and Mongolia. The Molecular Biology of Hearing and Deafness.Bethesda, MD 2001: 4-7 .59. Yao YG, Salas A, Bravi CM, Bandelt HJ: A reappraisal of completemtDNA variation in East Asian families ... Riazuddin S, Kabra M, Erdenetungalag R, Rad-naabazar J, Khan S, Pandya A, Usami SI, Nance WE, Wilcox ER, Ria-zuddin S, Griffith AJ: Origins and frequencies of SLC2 6A4 (PDS)mutations in east...