Study	Reason for exclusion
ACCELA	The specifics of the intervention arms are unclear at this time. We cannot conclude which study arms also used clopidogrel. Also, no study outcomes are available at this time
CASTLE	This study was a safety study performed over 3.5 years, which is a much longer follow‐up than other included studies. Authors were contacted for data from earlier time‐points, but we received no response
Hsieh 2009	Currently unable to determine if the study was double blinded, or if the study population was made up of participants with intermittent claudication. Also, the outcomes reported are not within the scope of this review
Kim 2013	Cannot determine if study population was made up of participants with intermittent claudication. Also, the outcomes reported are not within the scope of this review
MASCOT	Study was discontinued early, and no outcome data is available
Otsuka Study PUIC‐1	Currently cannot determine if the study was double‐blinded
Otsuka Study PUIC‐2	Currently not sufficient details of the study methods or outcomes to include
Samra 2003	Non‐randomised study
SPAD	Cannot determine if study population was made up of participants with intermittent claudication