Downloads a pubmed xml file given the file numbe and optional directory
to save the file too. If dir is unset then the default_data_dir is used
which can be set by calling set_default_data_dir
Note: this executes a shell command and assumes that "curl" is available
If it is not, the command will fail.
Downloads a pubmed xml file given the file numbe and optional directory to save the file too. If dir is unset then the
default_data_diris used which can be set by callingset_default_data_dirNote: this executes a shell command and assumes that "curl" is available If it is not, the command will fail.