About Etarfolatide (EC20)Etarfolatide is a folate-targeted molecular imaging agent that is being developed as a non-invasive method to identify tumors that over-express folate receptors. These tumors are the molecular target of Endocyte's folate-targeted therapeutic compounds such as vintafolide. To date, etarfolatide has been administered to over 550 patients. About the PROCEED Trial The PROCEED trial is a Phase III randomized, double-blind clinical trial evaluating vintalofide in combination with PLD compared to PLD plus placebo for the treatment of folate-receptor positive platinum-resistant ovarian cancer. The primary endpoint of the trial is progression-free survival as measured by RECIST (Response Evaluation Criteria In Solid Tumor) criteria in patients with folate-receptor positive tumors assessed by etarfolatide imaging. Overall survival is a secondary endpoint. The trial anticipates recruiting more than 400 patients at approximately 150 sites in the U.S., Canada, Europe, and Asia. For further information regarding the PROCEED trial please visit http://www.clinicaltrials.gov. About Merck Today's Merck is a global healthcare leader working to help the world be well. Merck is known as MSD outside the United States and Canada. Through our prescription medicines, vaccines, biologic therapies, and consumer care and animal health products, we work with customers and operate in more than 140 countries to deliver innovative health solutions. We also demonstrate our commitment to increasing access to healthcare through far-reaching policies, programs and partnerships. For more information, visit www.merck.com and connect with us on Twitter, Facebook and YouTube. About Endocyte Endocyte is a biopharmaceutical company developing targeted therapies for the treatment of cancer and inflammatory diseases. Endocyte uses its proprietary technology to create novel Small Molecule Drug Conjugates (SMDCs) and companion imaging diagnostics for personalized targeted therapies. The company's SMDCs actively target receptors that are over-expressed on diseased cells, relative to healthy cells. This targeted approach is designed to enable the treatment of patients with highly active drugs at greater doses, delivered more frequently, and over longer periods of time than would be possible with the untargeted drug alone. The companion imaging diagnostics are designed to identify patients whose disease over-expresses the target of the therapy and who are therefore more likely to benefit from treatment.