In a large cohort of pwCF (n = 6,365), we previously identified five CF lung disease modifier loci by genome-wide association studies (GWAS) (Corvol et al., 2015), including one containing the solute carrier family six member 14 gene (SLC6A14, also known as ATB0,+). The gene discussed is SLC6A14; the disease is cystic fibrosis.