Study	Reason for exclusion
Anderson 2007	ITS. Excluded because of study intervention. Generic substitution not targeted at prescribers but rather at sales and dispensing policies review. Sweden.
Chou 2003	CBA. Excluded because of study intervention. Separation of dispensing and prescribing function of prescribers which is part of Dispensing policy review. China
Lu 2011	ITS. Excluded because of study intervention. Prior Authorisation is part of another policy review. USA

CBA: Controlled before‒after

ITS: interrupted time series

USA: United States of America