In addition to HHIP, AT2B cells were major expressors of other genes commonly identified in COPD GWAS including SERPINA125,26 and SFTPD, as demonstrated by a dot plot showing the cell-type-specific expression of top COPD GWAS genes (Supplemental Fig. 6)27. The gene discussed is SFTPD; the disease is chronic obstructive pulmonary disease.