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Publisher
- elsevier bv44
- lancet publishing group26
- elsevier ltd20
- elsevier18
- cairo univ, dept neurol, cairo, egypt.11
- ctr healthy start initiat, lagos, nigeria.10
- emory univ, rollins sch publ hlth, atlanta, ga 30322 usa.10
- erasmus mc, dept publ hlth, rotterdam, netherlands.10
- ahmadu bello univ, dept community med, zaria, nigeria.7