AUTHOR=Marcucci Fabrizio , Berenson Ronald , Corti Angelo TITLE=Improving Drug Uptake and Penetration into Tumors: Current and Forthcoming Opportunities JOURNAL=Frontiers in Oncology VOLUME=3 YEAR=2013 URL=https://www.frontiersin.org/journals/oncology/articles/10.3389/fonc.2013.00161 DOI=10.3389/fonc.2013.00161 ISSN=2234-943X