id	domain	url
ajopa-2	doi.org	https://doi.org/10.4102/ajopa.v1i0.2
ajopa-2	doi.org	https://doi.org/10.1371/journal.pone.0020476
ajopa-2	doi.org	https://doi.org/10.1191/1478088706qp063oa
ajopa-2	doi.org	https://doi.org/10.4102/sajip.v30i4.171
ajopa-2	doi.org	https://doi.org/10.9707/2307-0919.1022
ajopa-2	doi.org	https://doi.org/10.1111/j.1471-1842.2009.00848.x
ajopa-2	doi.org	https://doi.org/10.1046/j.1365-2648.2000.t01-1-01567.x
ajopa-2	doi.org	https://doi.org/10.1177/0081246314533634
ajopa-2	doi.org	https://doi.org/10.1371/journal.pmed.1000100
ajopa-2	hdl.handle.net	http://hdl.handle.net/11394/6099
ajopa-2	www.sbirc.ed.ac.uk	http://www.sbirc.ed.ac.uk/documents/advice%20on%20how%20to%20write%20a%20systematic%20review.pdf