Service level – these are typically provided by
more than one individual, each providing a complex
package of care in a specific context and inter-
acting with others in a complex way. Examples,
might include stroke unit interventions [12] or early
supported discharge teams [13]. It is interesting to
note that some of the most robust stroke rehabilita-
tion evidence comes from trials of such complex
interventions. However, there is often difficulty in
interpreting and implementing such evidence.