Table 1.

Questions used to structure the modified nominal group.

1.	Can current interventions be included (i.e. is the taxonomy complete)?
2.	Is the proposed classification clear and meaningful? Does the typology include all potentially relevant and important factors, grouped in a meaningful manner?
3.	Is the identification of factors likely to be influential in determining clinical outcome, generalisability and implementation (i.e. the model) acceptable?
4.	Does the model adequately reflect the complexity of current interventions?
5.	Can future interventions be included in the model?
6.	Is the classification compatible with other classification systems?
7.	Is it feasible to report the required information in articles/reports/