Table 1.

Search strategy

Number	Search terms
No 1	PS = (Abia OR Adamawa OR Akwa Ibom OR Anambra OR Bauchi OR Bayelsa OR Benue OR Borno OR Cross River OR Delta OR Ebonyi OR Edo OR Ekiti OR Enugu OR Abuja OR Gombe OR Imo OR Jigawa OR Kaduna OR Kano OR Katsina OR Kebbi OR Kogi OR Kwara OR Lagos OR Nassarawa OR Niger OR Ogun OR Ondo OR Osun OR Oyo OR Plateau OR Rivers OR Sokoto OR Taraba OR Yobe OR Zamfara)
No 2	CI = (Umuahia OR Yola OR Uyo OR Awka OR Bauchi OR Yenagoa OR Makurdi OR Maiduguri OR Calabar OR Asaba OR Abakaliki OR Benin City OR Ado-Ekiti OR Enugu OR Abuja OR Gombe OR Owerri OR Dutse OR Kaduna OR Kano OR Katsina OR Birnin Kebbi OR Lokoja OR Ilorin OR Ikeja OR Lafia OR Minna OR Abeokuta OR Akure OR Oshogbo OR Ibadan OR Jos OR Port Harcourt OR Sokoto OR Jalingo OR Damaturu OR Gusau)
No 3	CU = (NIGERIA)
No 4	No 1 OR No 2 OR No 3
No 5	TS = (HIV Infections OR HIV OR hiv-1* OR hiv-2* OR hiv1 OR hiv2 OR hiv infect* OR human immunodeficiency virus OR human immunedeficiency virus OR human immuno-deficiency virus OR human immune-deficiency virus OR acquired immunodeficiency syndrome OR acquired immunedeficiency syndrome OR acquired immuno-deficiency syndrome OR acquired immune-deficiency syndrome OR AIDS)
No 6	TI = (HIV Infections OR HIV OR hiv-1* OR hiv-2* OR hiv1 OR hiv2 OR hiv infect* OR human immunodeficiency virus OR human immunedeficiency virus OR human immuno-deficiency virus OR human immune-deficiency virus OR acquired immunodeficiency syndrome OR acquired immunedeficiency syndrome OR acquired immuno-deficiency syndrome OR acquired immune-deficiency syndrome OR AIDS)
No 7	No 5 OR No 6
No 8	No 4 AND No 7
No 9	No 8 LIMITS: DocType = Article OR Review; Language = All languages; Year = 1980 to 2006