TY - JOUR T1 - The Program Science initiative: improving the planning, implementation and evaluation of HIV/STI prevention programs JF - Sexually Transmitted Infections JO - Sex Transm Infect SP - 157 LP - 159 DO - 10.1136/sextrans-2011-050389 VL - 88 IS - 3 AU - Sevgi O Aral AU - James F Blanchard Y1 - 2012/04/01 UR - http://sti.bmj.com/content/88/3/157.abstract N2 - In this article, the authors describe the Program Science initiative in detail, discuss some of its recent accomplishments and explore its significance and timeliness in light of the HIV prevention challenges. The authors also describe the Program Science series being launched and present a preview of future articles. ER -