 Patients who are enrolled in the study will fill out a questionnaire comprised of the gastroparesis cardinal symptom index daily diary GCSI-DD and visual analog scale VAS to assess severity of nausea, vomiting, abdominal pain, and bloating. Then, patients will undergo autonomic function measurements using the Ansar system which is a non-invasive measurement of the autonomic system using blood pressure, heart rate, and respiratory rate monitoring. Ansar testing takes approximately 15 minutes. 