Elyssa Lehman1, Robert T Abraham2. 1. Oncology Research and Development Group, 401 North Middletown Road/PRL-200/4502D, Pfizer Worldwide Research and Development, Pearl River, NY 10965, USA. 2. Oncology Research and Development Group, 10646 Science Center Drive/CB4, Pfizer Worldwide Research and Development, San Diego, CA 92121, USA. robert.abraham@pfizer.com.