 - Short Form -36 Quality of Life Questionnaire SF-36: We will use the SF-36 Health Survey 4-week recall version. The questionnaire addresses eight independent subscales: physical functioning, physical role functioning, bodily pain, general health, vitality, social role functioning, emotional role functioning, and mental health. Each subscale ranges from 0 to 100. Based on the subscales, two superior physical and mental component summary scales can be identified. These have mean values of 50 and an SD of 10. A German patient with a psychological sum scale of 65 exhibits above average mental health compared with age-matched and sex-matched Germans. 