[1] Queen Elizabeth Cent Hosp, Dept Internal Med, Internal Med, Blantyre, Malawi
[2] Univ Malawi, Dept Surg, Coll Med, Blantyre, Malawi
[3] Queen Elizabeth Cent Hosp, Mercy James Ctr, Blantyre, Malawi
[4] Queen Elizabeth Cent Hosp, Dept Anaesthesia & Intens Care, Anaesthesia & Crit Care, Blantyre, Malawi
[5] Univ Malawi, Dept Paediat, Coll Med, Blantyre, Malawi
[6] Karolinska Inst, Dept Global Publ Hlth, Stockholm, Sweden
[7] Karolinska Univ Hosp, Perioperat Med & Intens Care, Stockholm, Sweden
[8] Queen Elizabeth Cent Hosp, Main Lab, Blantyre, Malawi
[9] Univ Malawi, Dept Internal Med, Coll Med, Blantyre, Malawi