[1] Anglia Ruskin Univ, Sch Med, Emergency Med, Chelmsford, Essex, England
[2] Southend Univ Hosp, Chelmsford, Essex, England
[3] Anglia Ruskin Univ, Sch Med, Med Educ & Simulat, Chelmsford, Essex, England
[4] Anglia Ruskin Univ, Sch Med, Internal Med Crit Care, Chelmsford, Essex, England