;do not show dob identifier for patient
; input DFN = ien in file #2 [required]
; DGYR = 0/1 [optional]
; where 0 returns 4-digit year (default)
; 1 returns 2-digit year
; 2 returns File manager date
; output DOB = mm/dd/yyyy (default)
; = mm/dd/yy, if DGYR=1
; = yyymmdd, if DGYR=2