However, Figure 6b shows that in the case of CF patients homozygous for [F508del]CFTR, and who were also homozygous for TNS1 (rs2571445) G/G, there was a significantly lower BMI than for those patients who were heterozygous for TNS1 (rs2571445) A/G (p = 0.02). Here, TNS1 is linked to cystic fibrosis.