Author contributions
The contribution of the authors was as follows: study concept and design: S.C.G., S.R., C.K.S., M.S.R., J.V.K., K.L.; acquisition of data: J.D., B.H., and S.C.G.; data analysis: S.C.G.; interpretation of data: S.C.G., S.R., L.R.T. and S.G.; MATLAB code and manuscript draft: S.C.G.