1 FlyBase, Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, U.K.
2 Institute of Healthy Ageing and the Research Department of Genetics, Evolution, and Environment, University College London, London, U.K.
3 Pennsylvania State University, Center for Eukaryotic Gene Regulation, University Park, PA, U.S.A.
4 Clark H Smith Brain Tumour Centre, Arnie Charbonneau Cancer Institute, & Department of Biochemistry and Molecular Biology, University of Calgary, Alberta, Canada.