PKHD1 and polycystic kidney disease: The remaining 10 positions associated with a high number of peripheral blood leukocyte counts included an intronic SNP located in the Polycystic kidney and hepatic disease 1 gen, (PKHD1 - ENSBTAG00000011237) and a synonymous substitution in the Proline-rich coiled-coil 2A gene (PRRC2A - ENSBTAG00000019682).