“Neuromuscular Electrical Stimulation (NMES) As an Add-on Therapy for the Improvement of Dyspnea in Patients With Post-Covid Syndrome: A Protocol for a Phase II Randomized, Non-Pharmacological Intervention-Controlled, Double-Blind Study”. Principles and Practice of Clinical Research 8, no. 3 (December 2, 2022): 19–28. Accessed November 27, 2024. https://journal.ppcr.org/index.php/ppcrjournal/article/view/186.