@ARTICLE{
author={Sokka Tuulikki,Hakkinen Arja,Kautiainen Hannu,Maillefert Jean Francis,Toloza Sergio,Hansen Troels Mork,Calvo-Alen Jaime,Oding Rolf,Liveborn Margareth,Huisman Margriet,Alten Rieke,Pohl Christof,Cutolo Maurizio,Immonen Kai,Woolf Anthony,Murphy Eithne,Sheehy Claire,Quirke Edel,Celik Selda,Yazici Yusuf,Tlustochowicz Witold,Kapolka Danuta,Skakic Vlado,Roikovich Bernadette,Muller Raili,Stropuviene Sigita,Andersone Daina,Drosos Alexandros A,Lazovskis Juris,Pincus Theodore},
year={2008},
title={Physical inactivity in patients with rheumatoid arthritis: Data from twenty-one countries in a cross-sectional, international study},
journal={ARTHRITIS & RHEUMATISM-ARTHRITIS CARE & RESEARCH},
volume={59},
number={1},
pages={42-50},
document_type={Article},
} 

@ARTICLE{
author={Sokka Tuulikki,Verstappen Suzan MM,Hetland Merete Lund,Makinen Heidi,Naranjo Antonio,Belmonte Miguel,Baecklund Eva,Henrohn Dan,Herborn Gertraud,Rau Rolf,Morelli Alessia,Ferraccioli Gianfranco,Combe Bernard,McClinton Catherine,Tunc Recep,Sierakowski Stanislaw,Romanowski W,Skakic Vlado,Murphy Eithne,Sheehy Claire,Bergman Martin},
year={2006},
title={Work disability in patients with rheumatoid arthritis in 15 countries.},
journal={ARTHRITIS AND RHEUMATISM},
volume={54},
number={9},
pages={S99-S99},
document_type={Meeting Abstract},
} 

@ARTICLE{
author={Sokka Tuulikki,Verstappen Suzan MM,Hetland Merete Lund,Makinen Heidi,Naranjo Antonio,Belmonte Miguel,Baecklund Eva,Henrohn Dan,Herborn Gertraud,Rau Rolf,Morelli Alessia,Ferraccioli Gianfranco,Combe Bernard,McClinton Catherine,Tunc Recep,Sierakowski Stanislaw,Romanowski W,Skakic Vlado,Murphy Eithne,Sheehy Claire,Bergman Martin},
year={2006},
title={Work disability in patients with rheumatoid arthritis in 15 countries.},
journal={ARTHRITIS AND RHEUMATISM},
volume={54},
number={9},
pages={S57-S57},
document_type={Meeting Abstract},
}