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. 2019 Jun 20;74:e981. doi: 10.6061/clinics/2019/e981

Figure 1.

Figure 1

Serum levels of Activin A and TNF-α in COPD patients. A: Elevated serum Activin A levels were present in COPD patients relative to controls. B: Serum TNF-α levels were significantly increased in patients with COPD.