Majewska E, Kasielski M, Luczynski R, Bartosz G, Bialasiewicz P, Nowak D. Elevated exhalation of hydrogen peroxide and thiobarbituric acid reactive substances in patients with community acquired pneumonia. Respir Med. 2004 Jul;98(7):669–76. doi: 10.1016/j.rmed.2003.08.015. PMID: 15250234.