title: Viral and atypical pathogens as causes of type 1 acute exacerbations of chronic bronchitis.
authors.affiliation: University Hospital, Department of Medicine, Division of Infectious Diseases and AIDS, Utrecht, The Netherlands.
authors.forename: Peter H.
authors.initials: PH
authors.lastname: Roessingh
authors.forename: Anton M.
authors.initials: AM
authors.lastname: van Loon
authors.forename: Jan W.J.
authors.initials: JW
authors.lastname: Lammers
authors.forename: Andy I. M.
authors.initials: AI
authors.lastname: Hoepelman