| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated | 
| To assess the efficacy of A/H1N1 vaccination in patients treated with rituximab therapy |  | 
| MedDRA Classification | 
| E.1.3 | Condition being studied is a rare disease | No | 
| E.2 Objective of the trial | 
| E.2.1 | Main objective of the trial | 
| The aim of this study is to evaluate the effect of rituximab on the efficacy of vaccination with the A/H1N1-vaccine in RA patients 
 The coprimary immunogenicity end points are the proportion of subjects with antibody titers of 1:40 or more on hemagglutination-inhibition (HI) assay, the proportion of subjects with either seroconversion or a significant increase in antibody titer (more than 4-fold), and the factor increase in the geometric mean titer (GMT), measured 4 weeks after the last administration of the vaccine.
 |  | 
| E.2.2 | Secondary objectives of the trial | 
| The secondary endpoint is to analyse the B-lymphocyte count at the same time point as the determination of the antibody titers. 
 
 |  | 
| E.2.3 | Trial contains a sub-study | No | 
| E.3 | Principal inclusion criteria | 
| Inclusion criteria for group A -	Able and willing to give written informed consent
 -	RA diagnosed according to the revised 1987 criteria of the American College of Rheumatology (ACR) for at least 3 months
 -	Age 18-85 years
 -	Been treated with rituximab and B-cell depleted (<0.1x109/L)
 
 Inclusion criteria for group B
 -    Able and willing to give written informed consent
 -	RA diagnosed according to the revised 1987 criteria of the American College of Rheumatology (ACR) for at least 3 months
 -    Age 18-85 years
 
 Inclusion criteria for healthy volunteers
 -    Able and willing to give written informed consent
 -    Age 18-85 years
 
 |  | 
| E.4 | Principal exclusion criteria | 
| Exclusion criteria for group A and B -	Therapy within the previous 60 days with:
 •	any experimental drug
 •	monoclonal antibodies ( for group A: other than rituximab)
 •	growth factors
 •	other anti-cytokines
 -	Therapy within the previous 28 days with:
 •	parenteral or intra-articular corticoid injections
 •	oral corticosteroid therapy exceeding a prednisone equivalent of 10 mg daily
 -	Chronic infections or infections requiring anti-microbial therapy. Other active medical conditions such as inflammatory bowel disease, bleeding diathesis, or severe unstable diabetes mellitus
 -	Any concomitant medical condition which would in the investigator’s opinion compromise the patient’s ability to tolerate, absorb, metabolize or excrete the study medication.
 -	Mental condition rendering the patient unable to understand the nature, scope and possible consequences of the study and/or evidence of an uncooperative attitude.
 
 Exclusion criteria for healthy volunteers
 -    Any clinically significant medical condition
 
 |  | 
| E.5 End points | 
| E.5.1 | Primary end point(s) | 
| The coprimary immunogenicity end points are the proportion of subjects with antibody titers of 1:40 or more on hemagglutination-inhibition (HI) assay, the proportion of subjects with either seroconversion or a significant increase in antibody titer (more than 4-fold), and the factor increase in the geometric mean titer (GMT), measured 4 weeks after the last administration of the vaccine. |  | 
| E.6 and E.7 Scope of the trial | 
| E.6 | Scope of the trial | 
| E.6.1 | Diagnosis | No | 
| E.6.2 | Prophylaxis | No | 
| E.6.3 | Therapy | No | 
| E.6.4 | Safety | No | 
| E.6.5 | Efficacy | Yes | 
| E.6.6 | Pharmacokinetic | No | 
| E.6.7 | Pharmacodynamic | No | 
| E.6.8 | Bioequivalence | No | 
| E.6.9 | Dose response | No | 
| E.6.10 | Pharmacogenetic | No | 
| E.6.11 | Pharmacogenomic | No | 
| E.6.12 | Pharmacoeconomic | No | 
| E.6.13 | Others | No | 
| E.7 | Trial type and phase | 
| E.7.1 | Human pharmacology (Phase I) | No | 
| E.7.1.1 | First administration to humans | No | 
| E.7.1.2 | Bioequivalence study | No | 
| E.7.1.3 | Other | No | 
| E.7.1.3.1 | Other trial type description |  | 
| E.7.2 | Therapeutic exploratory (Phase II) | No | 
| E.7.3 | Therapeutic confirmatory (Phase III) | No | 
| E.7.4 | Therapeutic use (Phase IV) | Yes | 
| E.8 Design of the trial | 
| E.8.1 | Controlled | Yes | 
| E.8.1.1 | Randomised | No | 
| E.8.1.2 | Open | No | 
| E.8.1.3 | Single blind | No | 
| E.8.1.4 | Double blind | No | 
| E.8.1.5 | Parallel group | Yes | 
| E.8.1.6 | Cross over | No | 
| E.8.1.7 | Other | No | 
| E.8.2 | Comparator of controlled trial | 
| E.8.2.1 | Other medicinal product(s) | No | 
| E.8.2.2 | Placebo | No | 
| E.8.2.3 | Other | Yes | 
| E.8.2.3.1 | Comparator description | 
| other group of RA patients and healthy controls |  | 
| E.8.3 | The trial involves single site in the Member State concerned | Yes | 
| E.8.4 | The trial involves multiple sites in the Member State concerned | No | 
| E.8.5 | The trial involves multiple Member States | No | 
| E.8.6 Trial involving sites outside the EEA | 
| E.8.6.1 | Trial being conducted both within and outside the EEA | No | 
| E.8.6.2 | Trial being conducted completely outside of the EEA | Information not present in EudraCT | 
| E.8.7 | Trial has a data monitoring committee | No | 
| E.8.8 | Definition of the end of the trial and justification where it is not the last
                        visit of the last subject undergoing the trial | 
| end of trial: 4 weeks after the last subject has received the injection |  | 
| E.8.9 Initial estimate of the duration of the trial | 
| E.8.9.1 | In the Member State concerned years | 0 | 
| E.8.9.1 | In the Member State concerned months | 5 | 
| E.8.9.1 | In the Member State concerned days | 0 |