Attewell, Robyn GWilson, Susan R2002-05-032004-05-192011-01-052004-05-192011-01-051994http://hdl.handle.net/1885/41249http://digitalcollections.anu.edu.au/handle/1885/41249-106482 bytesapplication/pdfen-AUstatisticsstatistical analysisheroin trialrandomised controlled trialtreatmentdependent heroin usersStatistical issues in planning a randomised controlled 'heroin trial'1994