Trial sites
| Principal investigator | Centre | City | District Health Board |
| Dr Harry McNaughton | Wellington Regional Hospital | Wellington | Capital and Coast |
| Dr Harry McNaughton Dr Tom Thomson | Hutt Hospital | Lower Hutt | Hutt Valley |
| Dr Carl Hanger | Princess Margaret Hospital/Burwood Hospital | Christchurch | Canterbury |
| Anna McRae | Auckland City Hospital | Auckland | Auckland |
| Dr Geoff Green | Middlemore Hospital | South Auckland | Counties Manukau |
| Dr Anna Ranta | Palmerston North Hospital | Palmerston North | MidCentral |
| Dr John Gommans | Hawkes Bay Hospital | Hastings | Hawkes Bay |