A review in Frontiers in Oncology by discoverers of the tumor penetrating peptide technology Drs Teesalu, Sugahara, and Ruoslahti summarizes  the discovery, applications, and future perspectives of the TPP for targeted delivery of payloads to tumors.   Front Oncol. 2013 Aug 27;3:216. doi: 10.3389/fonc.2013.00216. PMID: 23986882