A multicentre randomised study of intrasphincteric botulinum toxin in patients with oesophageal achalasia
V Annese, G Bassotti, G Coccia, M Dinelli, V D'Onofrio, G Gatto, G Leandro, A Repici, P A Testoni, A Andriulli, the GISMAD Achalasia Study Group
Gut May 2000, 46 (5) 597-600; DOI: 10.1136/gut.46.5.597