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Figure 1 Adapted from the clinical guideline algorithm used by the Department of Defense Vaccine Healthcare Center. CK = creatine kinase; CRP = C-reactive protein; ECG = electrocardiogram; ESR = erythrocyte sedimentation rate; FU = follow-up; LVEF = left ventricular ejection fraction; NSAID = non-steroidal anti-inflammatory drug; PA = posteroanterior; PCR = polymerase chain reaction.