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(A) Kidneys in a wild-type mouse at P0. (B) Etv4−/−;Etv5−/− mouse with two ureters but no kidneys. (C) Etv4−/−;Etv5−/−;Spry1−/− mouse with one ureter and no kidneys. Ki, kidney; Ad, adrenal gland; Ur, ureter; Go, gonad.
