text: Ethics statement 
  
  This study involving humans was approved by Regional 
  Committee for Medical Research Ethics in North Norway (REK 
  North: 
  at 
  the Data 
  Nordlandssykehuset Hospital Trust, Norway. This study was 
  legislation and 
  conducted in accordance with the 
  
  Protection Ofﬁcer  174,837)  and 
  
  local 