Anti–SARS-CoV Immunoglobulin G in Healthcare Workers, Guangzhou, China oleh Wei-Qing Chen, Ci-Yong Lu, Tze-wai Wong, Wen-Hua Ling, Zhong-Ning Lin, Yuan-Tao Hao, Qing Liu, Ji-Qian Fang, Yun He, Fu-Tian Luo, Jin Jing, Li Ling, Xiang Ma, Yi-Min Liu, Gui-Hua Chen, Jian Huang, Yuan-Sen Jiang, Wen-Qi Jiang, He-Qun Zou, Guang-Mei Yan