annual rate of decline in FVC from inclusion to 12 months, assessed by spirometry in accordance with international guidelines. Annual rate of decline in FVC will be estimated by linear regression from FVC measurements at inclusion and at 3, 6, 9 and 12 months.

annual rate of decline in FVC from inclusion to 12 months, assessed by spirometry in accordance with international guidelines. Annual rate of decline in FVC will be estimated by linear regression from FVC measurements at inclusion and at 3, 6, 9 and 12 months.