Presynapses in Kenyon cell dendrites in the mushroom body calyx of Drosophila. by Christiansen, F, Zube, C, Andlauer, T, Wichmann, C, Fouquet, W, Owald, D, Mertel, S, Leiss, F, Tavosanis, G, Luna, A, Fiala, A, Sigrist, S