_dta:
  1.  by Jean Roth , jroth@nber.org , 11 Feb 2015

  obs:     3,366,729                          
 vars:             2                          11 Feb 2015 19:16
 size:   101,001,870                          (_dta has notes)
-------------------------------------------------------------------------------
              storage   display    value
variable name   type    format     label      variable label
-------------------------------------------------------------------------------
npi             str10   %10s                  National Provider Identifier
                                                (NPI)
pfname          str20   %20s                  Provider First Name
-------------------------------------------------------------------------------
Sorted by:  npi