A randomized, double-blind study comparing the effects of beclomethasone and fluticasone on bone density over two years
JJ Egan, C Maden, S Kalra, JE Adams, R Eastell, AA Woodcock
European Respiratory Journal 1999 13: 1267-1275; DOI: 10.1034/j.1399-3003.1999.13f09.x