[1] Karolinska Inst, Widerstromska Huset, Dept Publ Hlth Sci, Tomtebodavagen 18A, S-17177 Stockholm, Sweden
[2] Muhimbili Univ Hlth & Allied Sci, Dept Emeregency Med, Dar Es Salaam, Tanzania
[3] Uppsala Univ, Dept Med Sci, Epihubben MCT Huset, Uppsala, Sweden
[4] Stellenbosch Univ, Fac Med & Hlth Sci, Div Emergency Med, Bellville, South Africa
[5] Univ Cape Town, Div Emergency Med, Cape Town, South Africa