Efficacy of two dosing schemes of a liquid containing ivy leaves dry extract EA 575 versus placebo in the treatment of acute bronchitis in adults
Axel Schaefer, Fanny Ludwig, Bruno M. Giannetti, Michael Bulitta, Anja Wacker
ERJ Open Research 2019 5: 00019-2019; DOI: 10.1183/23120541.00019-2019