About the Authors

Saskia Kuipers

Affiliations Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, The Netherlands , Department of Vascular Medicine, Academic Medical Center, Amsterdam, The Netherlands

Suzanne C Cannegieter

To whom correspondence should be addressed. E-mail: s.c.cannegieter@lumc.nl

Affiliation Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, The Netherlands

Saskia Middeldorp

Affiliation Department of Vascular Medicine, Academic Medical Center, Amsterdam, The Netherlands

Luc Robyn

Affiliation Nestlé Medical Services, Vevey, Switzerland

Harry R Büller

Affiliation Department of Vascular Medicine, Academic Medical Center, Amsterdam, The Netherlands

Frits R Rosendaal

Affiliations Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, The Netherlands , Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

SK helped to design and coordinate the study, collect and analyze the data, and write the report. SCC helped to design and coordinate the study, analyze the data, and write the report. SM helped to design the study and write the report. LR helped to design the study and write the report. HRB and FRR helped to design and coordinate the study and write the report.