autoimmune disease treatmentneuromuscular degenerationdegenerative neuromuscular diseaseautoimmune disorder symptomsautoimmune hepatitis symptomsautoimmune thyroiditis symptomsautoimmune gastritis symptomscongenital neuromuscular diseaseneuromuscular conditionschronic neuromuscular diseasetypes of neuromuscular disordersneuromuscular junction disease