From SHA2017 Wiki
This is the First Aid station. It's open 24/7. If you have a medical emergency or just need some kind of injury looked at please walk in. If you are somewhere on the field and are injured please call 2222 on a DECT phone or +31 6 220 052 97 on any other phone. This will put you in contact with the central post of team safety. Please state the nature of your emergency and your location and help will be on its way.