BAK1 and sarcopenia: To examine the accuracy of our microarray results, we randomly selected three upregulated genes, IL1B, BAK1 and SOD1 (Superoxide Dismutase 1), and three downregulated genes, CDH1 (Cadherin 1), GNG11 (G Protein Subunit Gamma 11) and ZAP70 (Zeta Chain of T cell Receptor-Associated Protein Kinase 70), to verify their expression in 24-paired healthy controls and sarcopenia samples.