Diagnosing Achalasia
A great paper was written by researchers in Norway and Germany discussing the misdiagnosis of Achalasia. Specifically, this paper discusses "s a significant, and often striking, overlap in signs and symptoms between achalasia and ED [eating disorders], as well as associated psychosocial impairment."
I have made a significant update to my symptom survey based on this paper. See www.LivingWithAchalasia.org and download the book.