Partnerships for the Design, Conduct, and Analysis of Effectiveness, and Implementation Research: Experiences of the Prevention Science and Methodology Group C. Hendricks BrownSheppard G. KellamSheila KaupertBengt O. Muthen • Wei WangLinda K. MuthenPatricia ChamberlainCraig L. PoVey • Rick CadyThomas W. ValenteMitsunori OgiharaGuillermo J. Prado • Hilda M. PantinCarlos G. GalloJoseSzapocznikSara J. CzajaJohn W. McManus