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Median overall survival of patients with advanced nonblastoid MCL almost doubled during the past 30 years. Potential reasons for this apparent improvement in overall survival include the application of anthracycline-containing regimens and new approaches, such as antilymphoma antibodies or stem cell transplantation. Advances in general supportive care, new diagnostic tools, and general improvement of life span might have also reinforced this effect. However, our results are questioning the validity of historical comparisons which had been frequently applied in previous trials.
Herrmann et al. (2008) studied this question.