... andminorities in South-western China are 1137.4 million,5.4 million, 9.8 million, 10.7 million, 5.8 million, 10.8million, and 57.1 million, respectively (http://www.cnmuseum.com/intro/renkou_intro.asp, ... (Jilin province), Yin-chuan School for the Blind, Deaf and Dumb (Ningxia Province), Xining Spe-cial Education School (Qinghai province), Changan School for the Deaf and Dumb (Shaanxi province), ... deletion involving the connexin 30 gene in nonsyndromic hearing impairment. N Engl J Med 2002,346(4):243-249.22. Del Castillo I, Moreno-Pelayo MA, Del Castillo FJ, Brownstein Z, Mar-lin S, Adina...