anchor.diff:  RLZ01,Royal Shrewsbury Hospital,Shrewsbury,0
   RHM02,Southampton Childrens Hospital,Southampton,0
   RAJ01,Southend Hospital,Southend-on-Sea,0
  -RAQ01,Lister Hospital,Stevenage,1
  +RAQ01,Lister Hospital,Stevenage,0
   RJE01,University Hospital of North Staffordshire,Stoke-on-Trent,0
   RLNGH,Sunderland Royal Hospital,Sunderland,0
   RQHC7,Morriston Hospital,Swansea,0
  
positive.code: RNJ00,Barts and The London Hospital,London,1
  RJ122,Evelina Children's Hospital (Guys & St Thomas'),London,0
  RP4,Great Ormond Street Hospital for Children,London,0
  RJ121,Guy's and St Thomas's Hospital,London,0
  RJZ,King's College Hospital,London,1
  RAL01,Royal Free Hospital,London,0
  RJ701,St George's Hospital,London,0
  RQN02,West London Transplant & Renal Centre,London,0
  RM574,Manchester Royal Infirmary,Manchester,0
  RW3RM,Royal Manchester Children's Hospital,Manchester,0
  RCJAT,James Cook University Hospital,Middlesbrough,0
  
negative.code: 99RCSLB,Nottingham Childrens Hospital  (Queens Medical Centre),Nottingham,0
  RCSLB,Nottingham City Hospital,Nottingham,0
  45021,Tyrone County Hospital  (Western Trust),Omagh,0
  RNX02,Oxford Radcliffe Hospital,Oxford,1
  RK950,Derriford Hospital,Plymouth,0
  RHU02,Queen Alexandra Hospital,Portsmouth,0
  RMF01,Royal Preston Hospital,Preston,0
  