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Table 1 Comparison of the stages in an evaluation of complex interventions to stages of drug evaluation.

From: Developing the content of two behavioural interventions: Using theory-based interventions to promote GP management of upper respiratory tract infection without prescribing antibiotics #1

Evaluation of drugs Pre-clinical Phase I Phase II Phase III Phase IV
Evaluation of implementation strategies Theory Modelling Exploratory trial Definitive RCT Long term implementation