1 Department of Mathematical Sciences, Aalborg University, Skjernvej 4A, DK-9220 Aalborg, Denmark. Electronic address: mikl@math.aau.dk.
2 Department of Statistics, University of Auckland, PB 92019 Auckland, New Zealand.
3 School of Electronic Engineering and Computer Science, Queen Mary University of London, 10 Godward Square, London E1 4FZ, England, United Kingdom; School of Biological Sciences, Flinders University, GPO Box 2100, Adelaide SA 5001, Australia.
4 School of Biological Sciences, Flinders University, GPO Box 2100, Adelaide SA 5001, Australia.
5 Department of Statistics, University of Auckland, PB 92019 Auckland, New Zealand; ESR, PB 92021 Auckland, New Zealand.