by Puhan, Milo A, PhD, Garcia-Aymerich, Judith, PhD, Frey, Martin, MD, ter Riet, Gerben, PhD, Antó, Josep M, Prof, Agustí, Alvar G, PhD, Gómez, Federico P, MD, Rodríguez-Roisín, Roberto, Prof, Moons, Karel GM, Prof, Kessels, Alphons G, MD, Held, Ulrike, PhD
Published in The Lancet (British edition) (29.08.2009)