Appendix
This Appendix contains full references for the sources located as specified in the Methods section. Included at the end of each reference is a specification of the relevant linkage(s) in the conceptual framework. In total are specified 931 linkages (higher than the number of references as some sources cover more than one linkage). Local and household levels are generally well-covered while linkages at international and national levels have received much less attention. The 931 linkages are distributed (link no./no. of references): I1/2, I2/3, I3/2, I4/5, N1/8, N2/4, N3/57, N4/2, N5/1, N6/3, N7/1, L1/58, L2/158, L3/256, L4/8, H1/10, H2/292, H3/26, H4/30, H5/2  and H6/2.

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