| Criteria for evaluation of individual patient data | 
| Drug administration preceded thrombocytopenia; recovery from thrombocytopenia complete and sustained after drug discontinuedOther drugs administered prior to thrombocytopenia were continued or reintroduced after discontinuation of the suspected drugOther etiologies of thrombocytopenia excludedRe-exposure to the drug resulted in recurrent thrombocytopenia
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| Levels of evidence Definite: all 4 criteria metProbable: Criteria 1–3 metPossible: Criterion 1 metUnlikely: Criterion 1 not metData not evaluable*
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| Criteria for evaluation of group data | 
| Levels of evidence Definite: randomized controlled clinical trial demonstrating significantly greater frequency of thrombocytopenia in the drug administration groupProbable: non-randomized clinical trial demonstrating greater frequency of thrombocytopenia in the drug administration groupPossible: case series without controls reporting thrombocytopenia associated with drug administrationData not evaluable*
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