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There is currently great need for high-quality, low-cost, point-of-care diagnostics that can benefit patients in resource-limited settings and correspondingly growing interest in the diagnostic utility of microfluidic platforms that are based on paper. We describe the development, early clinical testing, and potential clinical impact of a novel paper-based, multiplexed microfluidic assay designed for rapid, semiquantitative measurement of aspartate aminotransferase and alanine aminotransferase in a fingerstick specimen. This device ultimately holds promise for providing universal access to affordable point-of-care screening for drug-induced liver injury in resource-limited settings and opens the door to development of similar point-of-care clinical assays for other important analytes. [Copyright &y& Elsevier]