H19 and Wilms tumor: We identified 22 highly expressed intergenic pri-miRNAs hosting kidney miRNAs including the Wilms tumor (renal neoplasm)-associated and imprinted transcript, H19, [52] a precursor for mir-675 [53] and the mir-17-92 cluster Mirhg1 pri-miRNA, with the latter being involved in embryonic lung proliferation and differentiation [54] (Additional file 9).