Schiavo, A.; Renis, M.; Polverino, M.; Iannuzzi, A.; Polverino, F. Acid–base Balance, Serum Electrolytes and Need for Non-Invasive Ventilation in Patients With Hypercapnic Acute Exacerbation of Chronic Obstructive Pulmonary Disease Admitted to an Internal Medicine Ward. Multidiscip Respir Med 2016, 11 (1). https://doi.org/10.4081/mrm.2016.320.