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Foreskin prepuce levels of the soluble antimicrobial peptides HNP1–3 (X axis, left), LL37 (X axis, center) and SLPI (X axis, right). Levels are shown on the Y axis as log10 transformed data, and were assayed for cases (n = 99, hatched bars) and controls (n = 109, white bars) at both the enrollment visit (left pair for each AMP) and the last visit prior to seroconversion (right pair for each AMP).
