90791document16386W4E_SOP_for_illiterate_participants.pdfapplication/pdf840b46b4939f6813fc1883f68a4ced003d236310b330c09c864caf0546d78657SHA256821842024-08-16 08:56:55https://datacompass.lshtm.ac.uk/id/eprint/4301/3/W4E_SOP_for_illiterate_participants.pdf