\note{
Branch lengths are not supported in the present version.
}
-\author{Emmanuel Paradis \email{Emmanuel.Paradis@mpl.ird.fr}}
+\author{Emmanuel Paradis}
\references{
Diaconis, P. W. and Holmes, S. P. (1998) Matchings and phylogenetic
trees. \emph{Proceedings of the National Academy of Sciences USA},