... Ibrahim11Department of Immunology, University of Rostock, Rostock, Germany2Department of Neurology, University of Rostock, Rostock, Germany3Department of Pathology, University of Rostock, Rostock, Germany4Institute ... anincreased frequency of memory phenotype of lpr T cellsupon stimulation with collagen, phenotypic analysis of sur-face expression of CD44 on T lymphocytes was performed.No change of memory cell populations ... controlgroups were analyzed using the Mann–Whitney U test for the severity of arthritis, the χ2 test for incidence of arthritis,and Student's t-test for day of disease onset, antibody lev-els,...