Effect of propranolol and clonidine after severe traumatic brain injury: a pilot randomized clinical trial oleh Mina F. Nordness, Amelia W. Maiga, Laura D. Wilson, Tatsuki Koyama, Erika L. Rivera, Shayan Rakhit, Michael de Riesthal, Cari L. Motuzas, Madison R. Cook, Deepak K. Gupta, James C. Jackson, Shawniqua Williams Roberson, William J. Meurer, Roger J. Lewis, Geoffrey T. Manley, Pratik P. Pandharipande, Mayur B. Patel