Table 1 Search strings for extracted literature

 #1

MeSH terms:

Drug Delivery Systems

 #2

All Fields:

drug delivery OR targeted drug OR drug targeting

 #3

 #4

MeSH terms:

Nanotechnology OR Nanostructures

 #5

All fields:

Nanomedicine OR Nanotechnology

 #6

 #7

MeSH terms:

South Africa

 #8

Free text:

South Africa OR South African

 #9

 #10

#3 AND #6 AND #9

January 2006 to April 2018

 #11

Filter #10 by specifying the time period