anchor.diff:  RNA03,Russells Hall Hospital,Dudley,0
   SYC02,Dumfries & Galloway Royal Infirmary,Dumfries,0
   STC01,Ninewells Hospital,Dundee,0
  -SSC02,Royal Infirmary of Edinburgh,Edinburgh,0
  +SSC02,Royal Infirmary of Edinburgh,Edinburgh,1
   RH8,Royal Devon and Exeter Hospital ,Exeter,0
   SGC04,Queen Elizabeth University Hospital,Glasgow,0
   SGC02,Royal Hospital for Sick Children,Glasgow,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: RLZ01,Royal Shrewsbury Hospital,Shrewsbury,0
  RHM02,Southampton Childrens Hospital,Southampton,0
  RAJ01,Southend Hospital,Southend-on-Sea,0
  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
  