Corrigendum: Metabolic changes before and after weaning in Dezhou donkey foals in relation to gut microbiota - Qiwen Yang; Qiwen Yang; Haibing Liu; Halima Jafari; Bing Liu; Zhaofei Wang; Jiangtian Su; Fuwen Wang; Ge Yang; Minhao Sun; Jie Cheng; Boying Dong; et al. (Frontiers in Microbiology)