Department of Biostatistics;
University of Pittsburgh;
Graduate School of Public Health;
Pittsburgh;
USA;
Department of Epidemiology;
University of Pittsburgh;
Graduate School of Public Health;
Pittsburgh;
USA;
Department of Physical Activity and Health;
University of Pittsburgh;
Pittsburgh;
USA;
Recall; Adolescent; Self-Report; Modifiable; Activity; Questionnaire; for; Adolescents;