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

  obs:     4,656,129                          
 vars:             2                          21 Nov 2015 11:15
 size:   125,715,483                          (_dta has notes)
-------------------------------------------------------------------------------
              storage   display    value
variable name   type    format     label      variable label
-------------------------------------------------------------------------------
npi             str10   %10s                  National Provider Identifier
                                                (NPI)
ploczip         str17   %17s                  Provider Business Practice
                                                Location Address Postal Code
-------------------------------------------------------------------------------
Sorted by:  npi