_dta:
  1.  by Jean Roth , jroth@nber.org , 23 Dec 2015

  obs:     1,116,116                          
 vars:             2                          23 Dec 2015 21:02
 size:    50,225,220                          (_dta has notes)
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              storage   display    value
variable name   type    format     label      variable label
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npi             str10   %10s                  National Provider Identifier (NPI)
aolname         str35   %35s                  Authorized Official Last Name
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Sorted by: npi