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KUMAR, Ishan; CHAUHAN, Richa Singh; VERMA, Ashish. Retrograde gastroesophageal intussusception: an exceedingly rare complication of Heller myotomy in a patient with achalasia cardia. Turkish Journal of Gastroenterology, [S. l.], v. 28, n. 4, p. 316–318, 2017. DOI: 10.5152/tjg.2017.17057. Disponível em: https://www.turkjgastroenterol.org/index.php/tjg/article/view/3098. Acesso em: 1 jan. 2026.