1. Laboratory of Molecular Genetics; National Institute on Deafness and Other Communication Disorders; National Institutes of Health; Bethesda Maryland 20892
2. Centre of Excellence in Molecular Biology; University of the Punjab; Lahore 54550 Pakistan
3. Department of Otorhinolaryngology Head & Neck Surgery; School of Medicine; University of Maryland; Baltimore Maryland 21201
4. Center for Statistical Genetics; Department of Molecular and Human Genetics; Baylor College of Medicine; Houston Texas 77030
5. Department of Biochemistry; Faculty of Biological Sciences; Quaid-i-Azam University; Islamabad 45320 Pakistan
6. Allama Iqbal Medical Research Centre; Jinnah Hospital Complex; University of Health Sciences; Lahore 54550 Pakistan