Correction: Genetic Variants of IκB Kinase β (IKBKB) and Polymerase β (POLB) Were Not Associated with Systemic Lupus Erythematosus Risk in a Chinese Han Population

• Yuan Li, 
• Ziyan Wu, 
• Shulan Zhang, 
• Si Chen, 
• Ping Li, 
• Jing Li, 
• Chongwei Cao, 
• Bin Liu, 
• Fengchun Zhang, 
• Yongzhe Li