Open Forum Infectious Diseases Siljan, W W, Holter, J C, Nymo, S H, Husebye, E, Ueland, T, Skattum, L, Bosnes, V, Garred, P, Frøland, S S, Mollnes, T E, Aukrust, P & Heggelund, L 2018, ' Low levels of immunoglobulins and mannose-binding lectin are not associated with etiology, severity, or outcome in community-acquired pneumonia ', Open Forum Infectious Diseases, vol. 5, no. 2, ofy002 . https://doi.org/10.1093/ofid/ofy002