Adding to the HIV Prevention Portfolio: The Achievement of Structural Changes by Coalitions Targeting to Reduce HIV Risk in Adolescents and Young Adults Through Community Mobilization in Urban Areas Across the US and Puerto Rico … Excerpt from: Adding to the HIV Prevention Portfolio: The Achievement of Structural Changes by Coalitions Targeting to Reduce HIV Risk in Adolescents and Young Adults Through Community Mobilization in Urban Areas Across the US and Puerto Rico