Barnes PJ, 1998, Am J Respir Crit Care Med, 157, S1, 10.1164/ajrccm.157.3.157315
10.1016/0954-6111(94)90044-2
Barnes PJ, 1993, Am Rev Respir Dis, 148, S1, 10.1164/ajrccm/148.4_Pt_2.S1
10.1111/j.1398-9995.1999.tb04385.x
10.1080/03014469000000952
10.1111/j.1651-2227.1993.tb12779.x
10.1111/j.1651-2227.1994.tb13138.x
10.1111/j.1651-2227.1994.tb13006.x
Agertoft L, 1998, Am J Respir Crit Care Med, 157, 178, 10.1164/ajrccm.157.1.9707072
10.1183/09031936.98.12010130
10.2165/00003495-198428060-00001
10.1136/bmj.291.6490.248-a
10.1080/08035259950169972
10.1203/00006450-199810000-00016
Fleiss JL. The design and analysis of clinical experiments. New York: John Wiley, 1986.
10.1002/(SICI)1099-0496(199906)27:6<369::AID-PPUL2>3.0.CO;2-0
10.1016/S0091-6749(97)70072-1
Doull IJ, 1995, Am J Respir Crit Care Med, 151, 1715, 10.1164/ajrccm.151.6.7767512
Tinkelman DG, 1993, Pediatrics, 92, 64, 10.1542/peds.92.1.64
Verberne AAPH, 1997, Am J Respir Crit Care Med, 156, 688, 10.1164/ajrccm.156.3.9611067
10.1056/NEJM199712043372304
10.1111/j.1651-2227.1997.tb08854.x
Aicardi G, 1993, Br J Rheumatol, 32, 39, 10.1093/rheumatology/32.suppl_2.39
Vignolo M, 1991, Clin Exp Rheumatol, 9, 41
10.1111/j.1651-2227.1986.tb10284.x
10.1203/00006450-197507000-00005
10.1016/0091-6749(82)90122-1
10.1016/0091-6749(77)90150-6
10.1111/j.1651-2227.1981.tb05768.x
McCowan C, 1998, BMJ, 316, 668, 10.1136/bmj.316.7132.668