STRategies to manage Emergency ambulance Telephone Callers with sustained High needs: an Evaluation using linked Data (STRETCHED) – a study protocol oleh Ann John, Ashrafunnesa Khanom, Anna Tee, Robert Cole, Ceri Phillips, Bernadette Sewell, Theresa Foster, Andy Rosser, Jason Scott, Bethan Edwards, Rachael Fothergill, Penny Gripper, Robin Petterson, Heather Hughes, Rabeea'h W Aslam