- Andrew Kotaska, resident (Kotaska@bulkley.net)
- Department of Obstetrics and Gynaecology, University of British Columbia, Women's Hospital, Vancouver, BC, Canada V6H 3V5
EDITOR—Boutron et al misquote a summary point to suggest that all complex procedures are not amenable to randomised investigation. They note that randomisation within a system of procedural excellence (not in 121 centres in 26 countries) can be a useful investigational tool. This certainly is the case; however, one must remember that procedural excellence always remains in evolution.
Wide variations in confidence …