Statistics and Bioinformatics Group, Institute of Fundamental Sciences, Massey University, Palmerston North, New Zealand. wandrille.duchemin@insa-lyon.fr.|Statistics and Bioinformatics Group, Institute of Fundamental Sciences, Massey University, Palmerston North, New Zealand. p.y.dupont@massey.ac.nz.|Statistics and Bioinformatics Group, Institute of Fundamental Sciences, Massey University, Palmerston North, New Zealand. m.campbell1@massey.ac.nz.|Institute of Mathematical and Natural Sciences, Massey University, Auckland, New Zealand. a.r.ganley@massey.ac.nz.|Statistics and Bioinformatics Group, Institute of Fundamental Sciences, Massey University, Palmerston North, New Zealand. m.p.cox@massey.ac.nz.