Clinical Trial of Efficacy and Safety of Rengalin in the Treatment of Cough in Patients With Chronic Obstructive Pulmonary Disease

Pirogov Russian National Research Medical University, Moscow

North-Western State Medical University named after I.I. Mechnikov, Saint Petersburg

North-western State Medical University named after I.I.Mechnikov, Saint Petersburg

"St. Petersburg State Budgetary Public Health Institution Vvedensky City Clinical Hospital", Saint Petersburg

The Federal State Institute of Public Health 'The Nikiforov Russian Center of Emergency and Radiation Medicine', Saint Petersburg

The First Pavlov State Medical University of St. Petersburg, Saint Petersburg

"St. Petersburg State Budgetary Institution City Hospital No. 40 in the Kurortny District", Sestroretsk

"St. Petersburg State Budgetary Institution of Health City Polyclinic No. 106", Saint Petersburg

Ryazan State Medical University named after academician I.P. Pavlov, Ryazan

Voronezh Regional Clinical Hospital №1, Voronezh

"Federal State Budgetary Educational Institution of Higher Education Kazan Medical University/Central City Clinical Hospital and Clinic #18", Kazan'

"Federal State Budgetary Educational Institution of Higher Education Kazan Medical University/Professor's Clinic", Kazan'

Samara City Hospital №4, Samara

"NUZ Road Clinical Hospital at the station Chelyabinsk JSC RZhD ", Chelyabinsk

"The State Budget Health Institution Regional Clinical Hospital No. 4", Chelyabinsk

"State Budgetary Institution of Health Care of the Nizhny Novgorod Region City Clinical Hospital No. 10", Nizhny Novgorod

"Regional state budgetary health care institution Regional Clinical Hospital", Barnaul

"Regional state budget health care institution City Hospital No. 5, Barnaul", Barnaul