[1] Univ Oslo, Inst Hlth & Soc, Fac Med, Dept Community Med & Global Hlth, PB 1130, N-0318 Oslo, Norway
[2] Oslo Univ Hosp, Dept Neurosurg, Oslo, Norway
[3] Elizabeth Cent Hosp, Minist Hlth, Dept Surg, Blantyre, Malawi
[4] Univ Malawi, Kamuzu Coll Nursing, Clin Nursing Dept, Blantyre, Malawi
[5] Univ Malawi, Sch Publ Hlth & Family Med, Dept Hlth Syst & Policy, Coll Med, Blantyre, Malawi