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Pastor A, Menéndez R, Cremades MJ, Pastor V, Llopis R, Aznar J.Pastor A, et al. Among authors: menendez r.Eur Respir J. 1997 Mar;10(3):603-9.Eur Respir J. 1997.PMID: 9072992Free article.
Menéndez R, Cordero PJ, Santos M, Gobernado M, Marco V.Menéndez R, et al.Eur Respir J. 1997 Jul;10(7):1542-6. doi: 10.1183/09031936.97.10071542.Eur Respir J. 1997.PMID: 9230244Free article.Review.