1 Department of Mechanical Engineering, University of Canterbury, Christchurch, New Zealand; Healthcare Services, Wellington Free Ambulance, Wellington, New Zealand. Electronic address: serah.allison@protonmail.com.
2 Department of Mechanical Engineering, University of Canterbury, Christchurch, New Zealand; Institute for Technical Medicine (ITeM), Furtwangen University, Villingen-Schwenningen, Germany.
3 Department of Mechanical Engineering, University of Canterbury, Christchurch, New Zealand.