Withdrawal of inhaled corticosteroids in COPD patients : Rationale and algorithms - Avdeev, S. (Clinical Department. Federal Pulmonology Research Institute. Federal Medical and Biological Agency of Russia) ; Aisanov, Z. (Department of Pulmonology. N.I. Pirogov Russian State National Research Medical University) ; Arkhipov, V. (Department of Clinical Pharmacology and Therapy. Russian Medical Academy of Continuous Professional Education) ; Belevskiy, A. (Department of Pulmonology. N.I. Pirogov Russian State National Research Medical University) ; Leshchenko, I. (Department of Phthisiology. Pulmonology and Thoracic Surgery. Ural State Medical University) ; Ovcharenko, S. (Department of Internal Diseases No.1. I.M. Sechenov First Moscow State Medical University) ; Shmelev, E. (Department of Differential Diagnostics. Federal Central Research Institute of Tuberculosis) ; Miravitlles, Marc. (Hospital Universitari Vall d'Hebron) ; Universitat Autònoma de Barcelona