Table 1 Search strategy

 1. Exp Sodium Chloride, Dietary/ or exp Sodium, Dietary/

 2. Salt or sodium

 3. Exp Africa/

 4.1 OR 2

 5. 3 AND 4

 6. Limit to humans

Google Scholar:

Note: Words in brackets are combined with an “OR”

(Africa Angola Benin Botswana “Burkina Faso” Burundi Cameroon “Cape Verde” “Central African Republic” Chad Comoros Congo “Cote d’Ivoire” Djibouti “Equatorial Guinea” Eritrea Ethiopia Gabon Gambia Ghana Guinea Guinea-Bissau Kenya Lesotho Liberia Madagascar Malawi Mali Mauritania Mauritius Mozambique Namibia Niger Nigeria Reunion Rwanda “Sao Tome and Principe” Senegal Seychelles “Sierra Leone” Somalia “South Africa” Sudan Swaziland Tanzania Togo Uganda “Western Sahara” Zambia Zimbabwe) AND (salt sodium) AND (dietary diet intake urine urinary)