Patients will be treated with Emend/ placebo administered intravenously on day 1 of cycles 1 of carboplatin based chemotherapy with crossover to the alternate agent (placebo/ Emend) on day 1 of cycle 2 with each cycle being 21 days. Fosaprepitant will be administered intravenously on day 1 of either cycle 1 or cycle 2 prior to carboplatin based chemotherapy. Placebo will be administered as the alternative agent. Study team and the subject will be blinded to fosaprepitant versus placebo.