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: 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,0
  RK950,Derriford Hospital,Plymouth,0
  RHU02,Queen Alexandra Hospital,Portsmouth,0
  RMF01,Royal Preston Hospital,Preston,0
  
negative.code: RNA03,Russells Hall Hospital,Dudley,0
  SYC02,Dumfries & Galloway Royal Infirmary,Dumfries,0
  STC01,Ninewells Hospital,Dundee,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
  