(logical) suppress messages? default: NULL
(same as setting FALSE). Set to TRUE to suppress messages, and FALSE
to not suppress messages
ncbi_sleep
(numeric/integer) number of seconds to sleep between
NCBI ENTREZ http requests. applies to the functions: classification(),
comm2sci(), genbank2uid(), get_uid() and ncbi_children().
defaults: 0.334 (without API key) or 0.101 (with API key). minimum value
can not be less than 0.101
quiet
(logical) quiet informational output from this function.
default: TRUE