Correction to: Scientific Reports https://doi.org/10.1038/s41598-018-19634-1, published online 23 January 2018

This Article contains errors in Equation 18.

\({{\rm{G}}}_{{\mathscr{N}}}({{\rm{\lambda }}}_{1},{{\rm{\lambda }}}_{1})=\frac{1}{{[{{\rm{\lambda }}}^{{\rm{T}}}{\bf{K}}{\rm{\lambda }}]}^{1/2}}\)

and \({\rm{\lambda }}\equiv {(1,{{\rm{\lambda }}}_{1},{{\rm{\lambda }}}_{2},{{\rm{\lambda }}}_{1},{{\rm{\lambda }}}_{2},)}^{{\rm{T}}}\).

should read:

\({{\rm{G}}}_{{\mathscr{N}}}({{\rm{\lambda }}}_{1},{{\rm{\lambda }}}_{1})=\frac{1}{{[{{\rm{\lambda }}}^{{\rm{T}}}{\bf{K}}{\rm{\lambda }}]}^{1/2}}\)

and \({\rm{\lambda }}\equiv {(1,{{\rm{\lambda }}}_{1},{{\rm{\lambda }}}_{2},{{\rm{\lambda }}}_{1}{{\rm{\lambda }}}_{2})}^{{\rm{T}}}\).