_dta:
  1.  by Jean Roth , jroth@nber.org , 20 Apr 2015

  obs:     4,474,290                          
 vars:             2                          20 Apr 2015 13:41
 size:    49,217,190                          (_dta has notes)
-------------------------------------------------------------------------------
              storage   display    value
variable name   type    format     label      variable label
-------------------------------------------------------------------------------
npi             str10   %10s                  National Provider Identifier
                                                (NPI)
pprimtax1       str1    %9s                   Healthcare Provider Primary
                                                Taxonomy Switch 1
-------------------------------------------------------------------------------
Sorted by:  npi