[1] Univ Bergen, Dept Clin Dent, Bergen, Norway
[2] Univ Bergen, Dept Global Hlth & Primary Hlth Care, Bergen, Norway
[3] Univ Bergen, Ctr Int Hlth, Dept Global Hlth & Primary Hlth Care, Bergen, Norway
[4] Haukeland Hosp, Dept Addict Med, Bergen, Norway
[5] Makerere Univ Kampala, Dept Pediat & Child Hlth, Sch Med, Coll Hlth Sci, Kampala, Uganda
[6] Univ Montpellier, Inserm 1058, Montpellier, France
[7] Univ Paris V, Paris, France
[8] Makerere Univ, Kampala, Uganda
[9] Univ Ouagadougou, Ouagadougou, Burkina Faso
[10] Univ Western Cape, Cape Town, South Africa