Published on in Vol 8, No 3 (2020): March
![Pilot Study of a Multilevel Mobile Health App for Substance Use, Sexual Risk Behaviors, and Testing for Sexually Transmitted Infections and HIV Among Youth: Randomized Controlled Trial Pilot Study of a Multilevel Mobile Health App for Substance Use, Sexual Risk Behaviors, and Testing for Sexually Transmitted Infections and HIV Among Youth: Randomized Controlled Trial](https://asset.jmir.pub/assets/09332b5a940e8bb4a5a0ff2c4d80c2fd.png 480w,https://asset.jmir.pub/assets/09332b5a940e8bb4a5a0ff2c4d80c2fd.png 960w,https://asset.jmir.pub/assets/09332b5a940e8bb4a5a0ff2c4d80c2fd.png 1920w,https://asset.jmir.pub/assets/09332b5a940e8bb4a5a0ff2c4d80c2fd.png 2500w)
1 School of Social Work, University of Michigan, Ann Arbor, MI, United States
2 School of Social Service Administration, University of Chicago, Chicago, IL, United States
3 Corner Health Center, Ypsilanti, MI, United States
4 School of Social Work, Boston University, Boston, MA, United States
5 See Acknowledgments, Ypsilanti
6 School of Nursing, University of Pennsylvania, Philadelphia, PA, United States