However, using only atopic patients, which were included based on skin prick test positivity and corroborating medical history of allergen-induced asthma, Karagiannidis and coworkers [72] reported a significant increase of TGFβ1 in the serum of asthmatics, attaining levels almost 7-fold higher than those measured in healthy controls. Here, TGFB1 is linked to asthma.