This small cross-sectional epidemiological study is designed to evaluate the prevalence of the following parameters in hospitalized patients in a tertiary teaching hospital (medical department only): * kidney insufficiency * obesity * use of unfractionated heparins / low molecular weight heparins * other drugs effecting the hemostatic system
Inclusion Criteria: * All patients hospitalized at the defined days (two days) at Kantonsspital Luzern, Department of Medicine