18880document4839SignalFunctions_Codebook.pdfapplication/pdfd66c634a4285df672e45f34964869e5d142a7dc0929711bdba68f5cde009ed61SHA2561194712018-01-16 15:16:29https://datacompass.lshtm.ac.uk/id/eprint/567/15/SignalFunctions_Codebook.pdf