_dta:
  1.  mdrfoichange set up by Jean Roth , jroth@nber.org , 19 Sep 2018
  2.  MAUDE Base data updates:  changes to existing Base data
  3.  SECTION-E (if source code is 'P', Section E to H will contain no data)
  4.  SECTION-G (only for report source 'M', others sources will be null)

  obs:       183,187                          
 vars:             4                          19 Sep 2018 05:43
 size:     1,282,309                          (_dta has notes)
------------------------------------------------------------------------------------------------------------------------------
              storage   display    value
variable name   type    format     label      variable label
------------------------------------------------------------------------------------------------------------------------------
mdr_report_key  long    %12.0g                Medical Device Reporting (MDR) Report Key
seqtype_of_report
                byte    %9.0g                 # of type_of_report
type_of_report  byte    %32.0g     type_of_report
                                              Type of Report (F7)
type_of_reportstr
                str1    %9s                   Type of Report (F7)
------------------------------------------------------------------------------------------------------------------------------
Sorted by: mdr_report_key
type_of_report:
           6 F = Followup 
           9 Initial submission 
          15 O = Other information submitted 
          24 X = Extra copy received 
         606 Followup, Followup 
         609 F = Followup, Initial Submission 
         906 Initial submission, Followup