Morino, Mario, Federico Famiglietti, Claudio Giaccone, and Fabrizio Rebecchi. 2013. “Robot-Assisted Heller Myotomy for Achalasia. Technique and Results”. Annali Italiani Di Chirurgia 84 (5):520-23. https://annaliitalianidichirurgia.it/index.php/aic/article/view/895.