Pseudoxantoma Elasticum: A clinical, histopathological and molecular updateABCC6/MRP6 mutations: further insight into the molecular pathology of pseudoxanthoma elasticumAnalysis of the frequent R1141 X mutation in the ABCC6 gene in Pseudoxanthoma Elasticum (PXE)Does Autosomal Dominant Pseudoxanthoma Elasticum Exist?ABCC6 and pseudoxanthoma elasticum