GGTLC1 and cystic fibrosis: In the July issue of the Journal of Cystic Fibrosis, Karnsakul et al. [18] examined the efficacy of noninvasive biomarkers to identify and monitor the progression of CFLD in pediatric CF patients and calculated a cut-off value of APRI of >0.437 and gamma-glutamyl transpeptidase (GGT)-to-platelet ratio (GPR) of >0.281.