sentence: Experiments were conducted with zebrafish embryos from the AB strain ( ZIRC , Eugene , OR , USA ) and the Tg ( − 6.8kbwt1a : GFP ) [ 38 ] , Tg ( wt1b : GFP ) [ 39 ] , Tg ( wt1b-coreProm-wt1bEnh : GFP ) [ 38 ] and Et ( − 26.5Hsa.WT1-1gata2 : EGFP ) [ 35 ] transgenic lines .