TGFB1 and atrial fibrillation: Before excluded SSS patients, no significant difference in genotype distribution (CC+CT/TT) of TGF-β1 T869C gene polymorphism was observed between the subjects with and without AF (34/12 vs. 144/57, OR = 1.122, 95% CI 0.543–2.318, p = 0.757), CAD (19/5 vs. 159/64, OR = 1.530, 95% CI 0.548–4.271, p = 0.417) or HT (74/35 vs. 104/34, OR = 0.691, 95% CI 0.396–1.208, p = 0.195).