Copyright ©ERS Journals Ltd 2007 From the authorsPulmonary Medicine, University Hospital Basel, Basel, Switzerland. We agree with I. Oransky that it is always a considerable weakness to be unable to follow up all patients. We believe that the outcome of our study 1 was not affected in a major way by the missing patients, as spontaneous pneumothorax is not a chronic disease or a malignant condition. We also believe that the geographical movement in this young population is unlikely to bias the follow-up of lung function. However, we agree with I. Oransky that effort should be directed towards good patient follow-up. REFERENCES
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