From April 2011 to March 2012, 1595 samples including
freshly slaughtered, chilled and frozen chicken carcasses were
collected from supermarkets and farmer’s markets in Beijing,
Changchun of Jilin province, Huhehaote of Inner Mongolia
Autonomous, Yanglin of Shanxi province, Yangzhou of Jiangsu
province and Guangzhou of Guangdong province, respectively.