Please cite the following reference when using TractoR in your
work:
J.D. Clayden, S. Muñoz Maniega, A.J. Storkey, M.D. King, M.E. Bastin & C.A.
Clark (2011). TractoR: Magnetic resonance imaging and tractography with R.
Journal of Statistical Software 44(8):1-18. tools:::Rd_expr_doi("10.18637/jss.v044.i08").