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. Author manuscript; available in PMC: 2019 Mar 21.
Published in final edited form as: EClinicalMedicine. 2018 Aug 31;2-3:22–28. doi: 10.1016/j.eclinm.2018.08.004

Fig. 3.

Fig. 3.

2 × 2 table of LC–MS/MS vs ELISA immunoassay results from banked negative urine samples and participants in PUMA study. 115 banked negative samples +102 urine samples from patients taking TDF/FTC in PUMA study; LC–MS/MS gold standard. TP = True positive; FP = false positive; FN = false negative; TN = true negative.