Department of Statistics, University of Warwick, Coventry CV47AL, UK. b.f.finkenstadt@warwick.ac.uk|Department of Statistics, University of Warwick, Coventry CV47AL, UK. b.f.finkenstadt@warwick.ac.uk|Department of Statistics, University of Warwick, Coventry CV47AL, UK. b.f.finkenstadt@warwick.ac.uk|Department of Statistics, University of Warwick, Coventry CV47AL, UK. b.f.finkenstadt@warwick.ac.uk|Department of Statistics, University of Warwick, Coventry CV47AL, UK. b.f.finkenstadt@warwick.ac.uk|Department of Statistics, University of Warwick, Coventry CV47AL, UK. b.f.finkenstadt@warwick.ac.uk|Department of Statistics, University of Warwick, Coventry CV47AL, UK. b.f.finkenstadt@warwick.ac.uk|Department of Statistics, University of Warwick, Coventry CV47AL, UK. b.f.finkenstadt@warwick.ac.uk|Department of Statistics, University of Warwick, Coventry CV47AL, UK. b.f.finkenstadt@warwick.ac.uk|Department of Statistics, University of Warwick, Coventry CV47AL, UK. b.f.finkenstadt@warwick.ac.uk