NTHi375 adhesion assays were performed by using HeLa-BGP (biliary glycoprotein or CD66a, currently known as CEACAM1) cells [34], a HeLa derivative cell line stably expressing hCEACAM1-4L [5], and previously used to assess the impact of CEACAM1 on bacterial infections [5,39]. The gene discussed is CEACAM1; the disease is bacterial infectious disease.