ID indicates identification; NT, not tested; pretreatment samples were tested only if provector sequences were detected in posttreatment samples; Neg, negative, NA, no sample available; subject unable or refused to obtain specimen; QNS, quantity of sample obtained was not sufficient for testing; (1), subject discontinued study for personal reasons; (2), subject was noncompliant, refused to provide samples, and withdrew from study; and Pos^TP, classified as a “transient positive” due to subsequent negative tests. This sample result of 1 positive of 10 replicates tested translates to a transduction frequency estimate of 1 in 3 million cells.

Reduced limit of target sequence detection.

One primer site showed one tenth positive, but second primer confirmed negative.