<qa>  What is the final dose of DOTAP:Chol-fus1?A treatment cycle on this study is 3 weeks. Participants will receive pre-medications of dexamethasone and diphenhydramine prior to the infusion of DOTAP:Chol-fus1 to try to lessen the potential reactions to the infusion. The participant will receive a short infusion of DOTAP:Chol-fus1 by vein once every 3 weeks. Participants will be examined by their doctor before each treatment. In addition, participants will return to the clinic on days 2, 3, and 8 after the first dose to have blood tests done, their vital signs checked, and to look for side effects. After every two treatment cycles or 6 weeks, the participants tumor will be measured using a CT or MRI scan. Participants can continue to receive treatments until the tumor gets worse, side effects become too severe, or a maximum of 6 treatments have been given. Treatment may continue for participants who continue to benefit from the treatment at the end of the planned 6 treatments if the treating physician, the principle investigator, and an advisor from the FDA all agree. Participants will return to the clinic 3 weeks after their last dose of DOTAP:Chol-fus1 to have their vital signs checked and to look for side effects. After all treatments are finished, participants will be contacted every 3 months for an update on their health and to gather information about any other treatments they have received. 