Research Article

Vitamin D Deficiency Is Associated with Muscle Atrophy and Reduced Mitochondrial Function in Patients with Chronic Low Back Pain

Figure 4

The content of PGC1-α in the muscles of LBP patients, visualized by representative western blotting. Changes in all presented protein densitometry levels were normalized against β-tubulin. a.u.: arbitrary units; F: female; M: male. Results were expressed as the . SUF (), DEF (), and SUPL (). —difference between the indicated result/mean and SUF.