LDLR and congenital bilateral aplasia of vas deferens from CFTR mutation: As vitamin K has shown beneficial effects in the treatment of CAVD, we evaluated the effect of MK4 on the progression of CAVD in hypercholesterolemic transgenic mice expressing ApoB100 but knockout for the low‐density lipoprotein receptor (LDLr) (LDLr−/−ApoB100/100 mice).