*Represents risk of bias based on: sequence generation of allocation; allocation concealment and blinding. ‘+’ represents low bias risk, ‘−’ high bias risk and ‘±’ unclear bias risk.

ABCD, Evaluating Additional Benefit of Cilostazol to Dual Antiplatelet Therapy in Patients with Long or Multivessel Coronary Artery Disease underwent Biolimus-Eluting Stent Implantation; ACS, acute coronary syndrome; AMI, acute myocardial infarction; BES, biolimus-eluting stent; BMS, bare metal stent; CIDES, comparison of cilostazol versus clopidogrel after drug-eluting stenting in diabetic patients; CILON-T, Influence of Cilostazol-based Triple Antiplatelet Therapy on Ischaemic Complication After Drug-eluting Stent Implantation; CLEAR, The Cilostazol Administration Before Percutaneous Coronary Intervention for Reduction of Periprocedural Myonecrosis Trial; CREST, Coronary Stent Restenosis in Patients Treated with Cilostazol; DECLARE-LONG II: Triple Antiplatelet Therapy With Dual Antiplatelet Therapy to Reduce Restenosis After Drug-Eluting Stent Implantation in Long Coronary Lesions; DECLARE-DIABETES, A Randomised Comparison of Triple Antiplatelet Therapy with Dual Antiplatelet Therapy After Drug-Eluting Stent Implantation in Diabetic Patients; DECLARE-LONG, Drug-Eluting Stenting Followed by Cilostazol Treatment Reduces Late Restenosis in Patients with Long Coronary Lesions; DES, drug-eluting stent; DM, diabetes mellitus; EES, everolimus-eluting stent; EES-PtCr, everolimus-eluting platinum-chromium alloy stent; LONG-DES, Sirolimus-Eluting Stent Versus Paclitaxel-Eluting Stent for Patients With Long Coronary Artery Disease; OPTIMUS-2, Impact of Cilostazol on Platelet Function Profiles in Patients with Diabetes Mellitus and Coronary Artery Disease on Dual Antiplatelet Therapy; PES, Paclitaxel-eluting stent; SES, Sirolimus-eluting stent; ZES, Zotarolimus-eluting stent; ZES-R, Zotarolimus-eluting Resolute stent.

Other trial expansions as in tables 1 and 2.