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

  obs:       599,841                          
 vars:             2                          21 Nov 2015 10:17
 size:     8,997,615                          (_dta has notes)
-------------------------------------------------------------------------------
              storage   display    value
variable name   type    format     label      variable label
-------------------------------------------------------------------------------
npi             str10   %10s                  National Provider Identifier
                                                (NPI)
aoname_prefix   str5    %9s                   Authorized Official Name Prefix
                                                Text
-------------------------------------------------------------------------------
Sorted by:  npi