A genome-wide transgenic resource for conditional expression of Drosophila microRNAs. by Bejarano, F, Bortolamiol-Becet, D, Dai, Q, Sun, K, Saj, A, Chou, Y, Raleigh, DR, Kim, K, Ni, J, Duan, H, Yang, J, Fulga, T, Van Vactor, D, Perrimon, N, Lai, E