Paramedic Acute Stroke Treatment Assessment (PASTA): study protocol for a randomised controlled trial oleh Christopher I. Price, Lisa Shaw, Peter Dodd, Catherine Exley, Darren Flynn, Richard Francis, Saiful Islam, Mehdi Javanbakht, Rachel Lakey, Joanne Lally, Graham McClelland, Peter McMeekin, Helen Rodgers, Helen Snooks, Louise Sutcliffe, Pippa Tyrell, Luke Vale, Alan Watkins, Gary A. Ford