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A full set of supplemental information will be made available when this manuscript is available for publication.

In the meantime the libraries, electrophysiological and anatomical data for the analyses presented in the paper are available on GitHub as follows:

* physplit.analysis source code for analysis functions * physplitdata anatomical and odour response data for recorded neurons * lhns complete library of LH input, local and output neurons

Note that the lhns package includes annotated skeleton data originally associated with Ann-Shyn Chiang's manuscript “Three-dimensional reconstruction of brain-wide wiring networks in Drosophila at single-cell resolution” (Current Biology 2011, 21(1), pp.1-11). Images from FlyCircuit were obtained from the NCHC (National Center for High-performance Computing) and NTHU (National Tsing Hua University), Hsinchu, Taiwan. We are grateful to Professor Chiang for his leadership in making these data freely available.