Conditions:   Arthritis, Rheumatoid;   Spondylarthritis;   Vasculitis
Intervention:   Biological: Hepatitis A vaccine and tetanus vaccine
Sponsors :   University of Zurich;   University of Zurich;   University of Basel;   Swiss Tropical & Public Health Institute;   University of Bern;   University Hospital, Geneva;   Cantonal Hospital of St. Gallen;   Cantonal Hospital of Aarau
Not yet recruiting - verified September 2013