Although Arkwright’s study on TGF-β1 polymorphisms included the combined TT/GG genotype (Codon 10/Codon 25) in the “high-producer” categorization of patients, no correlation was found between codon 25 genotype and measures of survival (age of death/transplantation), Pa infection or lung function [15]. Here, TGFB1 is linked to infection.