Implication of VHL, ERK5, and HIF-1alpha in clear cell renal cell carcinoma: Molecular basis11This study was supported by Grant from SAF-MINECO (ref: 2015-62215-R), Fundación Leticia Castillejo, Fundación para la Investigación en Urología of Asociación Española de Urología, Spain (AEU) (2011), Fundación para la Investigación Sanitaria (FIS) (ref: PI080432). The work carried out in our laboratory received support from the European Community through the regional development funding program (FEDER).