_dta:
  1.  mammography set up by Jean Roth , jroth@nber.org , 12 Oct 2018
  2.  NBER URL:  http://www.nber.org/data/fda-mammography-facilities.html
  3.  Source Page:
      http://www.fda.gov/Radiation-EmittingProducts/RadiationEmittingProductsandProcedures/MedicalImaging/MedicalX-Rays/ucm175028.htm
  4.  Source File URL: http://www.accessdata.fda.gov/premarket/ftparea/public.zip
  5.  Source Text File: public.txt

  obs:         8,706                          
 vars:             9                          12 Oct 2018 12:59
 size:     2,098,146                          (_dta has notes)
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              storage   display    value
variable name   type    format     label      variable label
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facility_name   str60   %60s                  Facility Name
address1        str40   %40s                  Address 1
address2        str40   %40s                  Address 2
address3        str37   %37s                  Address 3
city            str25   %25s                  City
state           str2    %9s                   State Abbreviation
zipcode         str10   %10s                  ZIP Code
phone           str16   %16s                  Phone
fax             str11   %11s                  Fax
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Sorted by: facility_name  address1  address2  address3  city  state  zipcode  phone  fax