Three-Year Changes in Low-Income Children's Physical Activity: Prospective Influence of Neighborhood Environment and Parent Supportive Behavior oleh Simone A. French, PhD, Yingling Fan, PhD, Alicia S. Kunin-Batson, PhD, Jerica M. Berge, PhD, MPH, LMFT, Nidhi Kohli, PhD, Rik Z. Lamm, BS, Nancy E. Sherwood, PhD