Calcium Channel Blockers and the Risk of Exacerbation in Patients with Chronic Obstructive Pulmonary Disease: A Nationwide Study of 48,488 Outpatients oleh Ema Rastoder, Pradeesh Sivapalan, Josefin Eklöf, Imane Achir Alispahic, Alexander Svorre Jordan, Christian B. Laursen, Jørgen Vestbo, Christine Jenkins, Rune Nielsen, Per Bakke, Gustavo Fernandez-Romero, Daniel Modin, Niklas Johansen, Filip Soeskov Davidovski, Tor Biering-Sørensen, Jørn Carlsen, Jens Ulrik Stæhr Jensen