Methodology and Implementation of a Randomized Controlled Trial (RCT) for Early Post-concussion Rehabilitation: The Active Rehab Study oleh Johna K. Register-Mihalik, Johna K. Register-Mihalik, Kevin M. Guskiewicz, Stephen W. Marshall, Stephen W. Marshall, Stephen W. Marshall, Karen L. McCulloch, Jason P. Mihalik, Martin Mrazik, Martin Mrazik, Ian Murphy, Dhiren Naidu, Dhiren Naidu, Shabbar I. Ranapurwala, Shabbar I. Ranapurwala, Kathryn Schneider, Kathryn Schneider, Kathryn Schneider, Paula Gildner, Michael McCrea, Active Rehab Study Consortium Investigators