1 Waikato Cardiothoracic Unit, Waikato Hospital, Hamilton, New Zealand; Faculty of Medical and Health Sciences, The University of Auckland, New Zealand. Electronic address: gimpeldamian@gmail.com.
2 Waikato Cardiothoracic Unit, Waikato Hospital, Hamilton, New Zealand.
3 Waikato Cardiothoracic Unit, Waikato Hospital, Hamilton, New Zealand; Faculty of Medical and Health Sciences, The University of Auckland, New Zealand.
4 Waikato Cardiothoracic Unit, Waikato Hospital, Hamilton, New Zealand; Faculty of Medical and Health Sciences, The University of Auckland, New Zealand; National Institute of Demographic and Economic Analysis, The University of Waikato, New Zealand.