Correction: The microbial community characteristics of ancient painted sculptures in Maijishan Grottoes, China

• Yulong Duan, 
• Fasi Wu, 
• Wanfu Wang, 
• Dongpeng He, 
• Ji-Dong Gu, 
• Huyuan Feng, 
• Tuo Chen, 
• Guangxiu Liu, 
• Lizhe An