<qa>  What is the goal of the group of participants?Participants entered at a given dose level will not be able to receive a higher dose while on study. A group of 3 participants will receive DOTAP:Chol-fus1 by vein at each dose level. After treating 3 participants at a given dose level, the participants will be observed for 2 weeks to evaluate the toxicity. The information showing if the participants develop severe side effects, referred to as dose-limiting toxicity DLT, will be recorded for computing the chance of toxicity. This information will be used to help select the dose level for the next group of participants. The goal is to find the dose level where 10 of participants develop severe side effects dose-limiting toxicity. 