1. Department of Histology and Embryology, Basic Medical College, Guangdong Medical University, Dongguan, Guangdong 523808, P.R. China
2. Department of Internal Medicine, The Second Clinical Medical College, Guangdong Medical University, Dongguan, Guangdong 523808, P.R. China
3. Department of Clinical Immunology, Institute of Laboratory Medicine, Guangdong Medical University, Dongguan, Guangdong 523808, P.R. China
4. Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Dongguan Scientific Research Center, Guangdong Medical University, Dongguan, Guangdong 523808, P.R. China