Fig. 1. TGF results in different group Fig. 1. TGF results in different group. Mann–Whitney U-test shows significant difference P<0.0001 between the two groups. TGF, transforming growth factor. From: Identification of low circulatory transforming growth factor β-1 in patients with degenerative heart valve disease☆ Interact CardioVasc Thorac Surg. 2010;11(6):791-793. doi:10.1510/icvts.2010.244384 Interact CardioVasc Thorac Surg | Published by European Association for Cardio-Thoracic Surgery. All rights reserved.