Canadian Journal of Surgery. 58(4 Suppl 2):S179, AUGUST 2015 Issn Print: 0008-428X Publication Date: August 2015 Print 19 Safety and efficacy of POEM for treatment of achalasia: a systematic review of the literature O.M. Crespin;A. Parmar;L.W.C. Liu;T.D. Jackson;E. Shlomovitz;A. Okrainec; + Author Information From the University of Toronto, Toronto, Ont. Checking for direct PDF access through Ovid Abstract Abstract unavailable for this article.