\item{method}{a character string specifying the method used to compute
the distances; two choices are available: \code{"pairwise"} and
\code{"percentage"}, or any unambiguous abbreviation of these.}
\item{method}{a character string specifying the method used to compute
the distances; two choices are available: \code{"pairwise"} and
\code{"percentage"}, or any unambiguous abbreviation of these.}