The underlying calculation and detailed results are described in detail in the following publications:

[ 1 ] A.Bredenstein, A.Denner, S.Dittmaier and M.M.Weber,
        Precise predictions for the Higgs-boson decay H → WW/ZZ → 4 leptons,
        Phys.Rev.D 74 (2006) 013004 [hep-ph/0604011]

[ 2 ] A.Bredenstein, A.Denner, S.Dittmaier and M.M.Weber,
        Precision calculations for the Higgs decays H → ZZ/WW → 4 leptons,
        Nucl. Phys. Proc. Suppl. 160 (2006) 131 [hep-ph/0607060]

[ 3 ] A.Bredenstein, A.Denner, S.Dittmaier and M.M.Weber,
        Radiative corrections to the semileptonic and hadronic Higgs-boson decays H → WW/ZZ → 4 fermions,
        JHEP 0702 (2007) 080 [hep-ph/0611234]

[ 4 ] L.Altenkamp, S.Dittmaier and H.Rzehak,
        Renormalization schemes for the Two-Higgs-Doublet Model and applications to h → WW/ZZ → 4 fermions,
        JHEP 1709 (2017) 134 [arXiv:1704.02645]

[ 5 ] L.Altenkamp, S.Dittmaier and H.Rzehak,
        Precision calculations for to h → WW/ZZ → 4 fermions in the Two-Higgs-Doublet Model with Prophecy4f,
        JHEP 1803 (2018) 110 [arXiv:1710.07598]

[ 6 ] L. Altenkamp, M. Boggia, S. Dittmaier,
        Precision calculations for to h → WW/ZZ → 4 fermions in a Singlet Extension of the Standard Model with Prophecy4f,
        JHEP 1804 (2018) 062 [arXiv:1801.07291]

[ 7 ] A. Denner, S. Dittmaier, J.-N. Lang,
        Renormalization of mixing angles,
        JHEP 1811 (2018) 104 [arXiv:1808.03466]