J. Gonzalez

Efficacy and safety of esmolol vs propranolol in the treatment of supraventricular tachyarrhythmias: a multicenter double-blind clinical trial.

J Abrams, A. Waldo, J. Anderson, 1985, American heart journal.

Use of N-acetylcysteine plus simethicone to improve mucosal visibility during upper GI endoscopy: a double-blind, randomized controlled trial.

E. Glasinovic, H. Monrroy, R. González, 2017, Gastrointestinal endoscopy.