For example, no single substitution or pair of substitutions was capable of engendering measurable (≥ four– fold) resistance to indinavir, and the level of resistance was dependent on the ways in which multiple substitutions were combined.
F. eks. kunne ingen enkeltsubstition eller substitutionspar skabe målelig (≥fire gange) indinavirresistens, og resistensniveauet var afhængig af måden flere substitutioner kombineredes på.