scholarly journals Difficulties in conducting a randomized controlled trial of health service interventions in intellectual disability: implications for evidence-based practice

2002 ◽  
Vol 46 (4) ◽  
pp. 340-345 ◽  
Author(s):  
P. C. Oliver ◽  
J. Piachaud ◽  
J. Done ◽  
A. Regan ◽  
S. Cooray ◽  
...  
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