[1
]
Institute of Clinical Sciences, The Sahlgrenska Academy, University of Göteborg, Box
426, 40530 Göteborg, Sweden. E-mail address for T.M. Thien: truike.thien@capio.se.
[2
]
The Norwegian Arthroplasty Register, Department of Clinical Medicine, University of
Bergen, Jonas Lies vei 65, 5021 Bergen, Norway. E-mail address for O. Furnes: ove-furnes@helse-bergen.no.
E-mail address for L.I. Havelin: leif.havelin@helse-bergen.no.
[3
]
Department of Orthopaedics and Traumatology, Turku University Hospital, P.O. Box 52,
20521 Turku, Finland. E-mail address: keijo.makela@tyks.fi.
[4
]
Institute of Clinical Research, University of Southern Denmark, Sdr. Boulevard 29,
5000 Odense, Denmark. E-mail address: soeren.overgaard@ouh.regionsyddanmark.dk.
[5
]
Department of Clinical Epidemiology, Aarhus University Hospital, Olof Palmes Alle
43-45, 8200 Aarhus, Denmark. E-mail address: abp@dce.au.dk.
[6
]
The Coxa Hospital for Joint Replacement, Box 652, 33101 Tampere, Finland. E-mail address:
antii.eskelinen@coxa.fi.
[7
]
Department of Public Health, University of Helsinki, Box 41, 00014 Helsinki, Finland.
E-mail address: pekka.pulkkinen@tyks.fi.