Comment on

• Risk factors for lower airway bacterial colonization in chronic bronchitis.

  Monsó E, Rosell A, Bonet G, Manterola J, Cardona PJ, Ruiz J, Morera J. Monsó E, et al. Eur Respir J. 1999 Feb;13(2):338-42. doi: 10.1034/j.1399-3003.1999.13b20.x. Eur Respir J. 1999. PMID: 10065678
• Predisposing factors to bacterial colonization in chronic obstructive pulmonary disease.

  Zalacain R, Sobradillo V, Amilibia J, Barrón J, Achótegui V, Pijoan JI, Llorente JL. Zalacain R, et al. Eur Respir J. 1999 Feb;13(2):343-8. doi: 10.1034/j.1399-3003.1999.13b21.x. Eur Respir J. 1999. PMID: 10065679