[1] Dept. of Internal Medicine,
[2] University Medical Center Nijmegen,undefined
[3] P.O Box 9101,undefined
[4] NL-6500 HB Nijmegen,undefined
[5] The Netherlands; Phone: (+31/24) 3541734,undefined
[6] Fax: (+31/24) 3614763,undefined
[7] e-mail: j.vanderMeer@aig.azn.nl,undefined
[8] Dept. of Pulmonary Medicine,undefined
[9] University Lung Center Dekkerswald,undefined
[10] The Netherlands,undefined
[11] Dept. of Medical Microbiology,undefined
[12] University Medical Center St. Radboud,undefined
[13] Nijmegen,undefined
[14] The Netherlands,undefined
[15] National Institute of Public Health and the Environment,undefined
[16] Bilthoven,undefined
[17] The Netherlands,undefined