AU  - Ko F, Vitale S, Chou C, Cotch M, Saaddine J, Friedman DS
TI  - PRevalence of nonrefractive visual impairment in us adults and associated risk factors, 1999-2002 and 2005-2008
PT  - JOUR
DP  - 2012
TA  - JAMA
pages = {2361-2368},
VI  - 308
IP  - 22
AID  - 10.1001/jama.2012.85685 [doi]
4100  - http://dx.doi.org/10.1001/jama.2012.85685
SO  - JAMA December 12, 2012 308(22):2361