_dta:
  1.  by Jean Roth , jroth@nber.org , 21 Nov 2015

  obs:     4,656,134                          
 vars:             2                          21 Nov 2015 11:25
 size:    65,185,876                          (_dta has notes)
-------------------------------------------------------------------------------
              storage   display    value
variable name   type    format     label      variable label
-------------------------------------------------------------------------------
npi             str10   %10s                  National Provider Identifier
                                                (NPI)
lastupdate      float   %td                   Last Update Date
-------------------------------------------------------------------------------
Sorted by:  npi