[…] weeks after acute infection with gastrointestinal symptoms (abdominal pain, vomiting, constipation, diarrhea, gastroparesis, ileus), orthostatic hypotension, erectile dysfunction
[orpha.net]
maneuver with normal phase IV overshoot, and normal forced respiratory sinus arrhythmia.
[mayoclinic.pure.elsevier.com]
The initial symptoms were gastrointestinal dysfunction in 3 patients and somatic motor dysfunction as their initial symptoms, one had irritability in 1 case, pain in 1 and dysphagia
[ncbi.nlm.nih.gov]