1. Long-term study of one hundred five patients with cystic fibrosis;Schwachman, H.; Kulczycki, L.L.;Ani J Dis Child,1958
2. The chest roentgenogram in cystic fibrosis: a new scoring system;Brasfield, D.; Hicks, G.; Soong Tiller, R.;Pediatrics,1979
3. The systematic evaluation of the chest radiograph in cystic fibrosis;Chrispin, A.R.; Norman, A.P.;Pediatr Radiol,1974
4. Lung function in children and adolescents: methods and reference values;Zapletel, A.; Samenek, T.P.,1987
5. Statistical methods for assessing agreement between two methods of clinical measurement;Bland, J.M.; Altman, D.G.;Lancet,1986