Correction: Respiratory and Immune Response to Maximal Physical Exertion following Exposure to Secondhand Smoke in Healthy Adults. - Andreas D. Flouris; Giorgos S. Metsios; Andres E. Carrillo; Athanasios Z. Jamurtas; Polychronis D. Stivaktakis; Manolis N. Tzatzarakis; Aristidis M. Tsatsakis; Yiannis Koutedakis (PLoS ONE, 2012)