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

  obs:     4,441,547                          
 vars:             2                          11 Mar 2015 17:07
 size:   119,921,769                          (_dta has notes)
-------------------------------------------------------------------------------
              storage   display    value
variable name   type    format     label      variable label
-------------------------------------------------------------------------------
npi             str10   %10s                  National Provider Identifier
                                                (NPI)
pmailzip        str17   %17s                  Provider Business Mailing Address
                                                Postal Code
-------------------------------------------------------------------------------
Sorted by:  npi