(Q44135695)
Statements
1 reference
External validity of randomized controlled trials in COPD. (English)
1 reference
1 reference
Brent Caldwell
1 reference
Mark Weatherall
1 reference
1 reference
Sarah Aldington
1 reference
Suzanne Marsh
1 reference
Mathew Williams
1 reference
Philippa Shirtcliffe
1 reference
17 November 2006
1 reference
1 reference
101
1 reference
6
1 reference
1313-1320
1 reference