Table 1.

Medline (PubMed) search strategy to identify published African ESCC literature.

#1	Search cancer or carcinoma or neoplasm* Field: Title/Abstract
#2	Search Esophageal or oesophageal Field: Title/Abstract
#3	#1 and #2
#4	Search “Esophageal cancer” Field: Title/Abstract
#5	Search “oesophageal cancer” or “oesophageal neoplasm*” Field: Title/Abstract
#6	Search “Esophageal Neoplasms”[Mesh]
#7	Search “Esophageal Neoplasms” Field: Title/Abstract
#8	Search “Esophageal squamous cell carcinoma” or “oesophageal squamous cell carcinoma” or ESCC Field: Title/Abstract
#9	Search ((((#3) OR #4) OR #5) OR #6) OR #7 OR #8
#10	Search “Africa”[Mesh]
#11	Search algeria OR angola OR benin OR botswana OR burkina faso OR burundi OR cameroon OR cape verde OR central african republic OR chad OR comoros OR congo OR “Democratic Republic of Congo” OR DRC OR djibouti OR equatorial guinea OR egypt OR eritrea OR ethiopia OR gabon OR gambia OR ghana OR guinea OR bissau OR ivory coast OR (Côte d’ Ivoire) OR jamahiriya OR kenya OR lesotho OR liberia OR Libya OR madagascar OR malawi OR mali OR mauritania OR mauritius OR mayotte OR morocco OR mozambique OR namibia OR niger OR nigeria OR principe OR reunion OR rwanda OR “Sao Tome” OR senegal OR seychelles OR “Sierra Leone” OR somalia OR “South Africa” OR st helena OR sudan OR swaziland OR tanzania OR togo OR tunisia OR uganda OR zaire OR zambia OR zimbabwe OR “Central Africa” OR “West Africa” OR “East Africa” OR “Southern Africa” OR “South Africa” Field: Title/Abstract
#12	Search (#10) or #11
#13	Search (#9) AND #12