TNF and Parkinson disease: Mondal et al.38extended these findings in a crossover study with 33 PD patients with FOG, showing that 1 month daily self‐administered tcVNS (two 120 second GammaCore stimulation at intervals of 5–10 minutes) improved gait performance, reduced TNF‐α, and increased BDNF and glutathione, without major adverse events.