In Chinese Erhualian pigs, QTLs affecting respiratory disease were identified by a genome-wide association study; CXCL6, CXCL8, KIT, and CTBP2 were highlighted as candidates that might associated with resistance or susceptibility to swine enzootic pneumonia-like respiratory disease (Huang et al., 2016). Here, CXCL6 is linked to respiratory system disorder.