Fig. 2
From: The role of matrix metalloproteinase-9 as a prognostic biomarker in papillary thyroid cancer
The mRNA level of MMP-9; a in PTC patients aged≥45 years compared to age < 45 years, b in PTC patients with higher TNM stages (III & IV) compared to lower stages (I & II), and c in PTC patients with lymphovascular invasion (yes) compared to those without invasion (no); PTC: papillary thyroid carcinoma; TNM: tumor node metastasis; error bars were defined as 1 SEM of the mean