Association of mannose-binding lectin, ficolin-2 and immunoglobulin concentrations with future exacerbations in patients with chronic obstructive pulmonary disease: secondary analysis of the randomized controlled REDUCE trial. - Vogt, Severin; Leuppi, Jörg D.; Schuetz, Philipp; Mueller, Beat; Volken, Carmen; Dräger, Sarah; Trendelenburg, Marten; Rutishauser, Jonas; Osthoff, Michael (Respiratory Research, 2021)