anchor.diff:  "104","Calciphylaxis"
   "105","Ischaemic bowel"
   "106","Ruptured AAA"
  -"107","Advanced CKD not on dialysis (conservative management)"
  +"107","Advanced CKD not on dialysis(conservative management)"
   "108","Acute kidney injury"
   "109","C Diff colitis"
   "110","Line related sepsis"
  
positive.code: "72","Perforation of colon"
  "73","COPD"
  "79","Multi-system failure"
  "81","Accident related to ERF treatment (not 25)"
  "82","Accident unrelated to ERF treatment"
  "99","Other identified cause of death"
  "100","Peritonitis (bacterial, with peritoneal dialysis)"
  
negative.code: "52","Suicide"
  "53","ERF treatment ceased for any other reason"
  "54","ERF treatment withdrawn for medical reasons"
  "61","Ureamia caused by graft failure"
  "62","Pancreatitis"
  "63","Bone marrow depression (Aplosia)"
  "64","Cachexia"
  "66","Malignant disease in patient treated by immunosuppressive therapy"
  "67","Malignant disease: solid tumors (Except those of 66)"
  