Disability by symptom: patients vs. controls.
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aSymptoms were ranked according to the average score (grade��weight).bP-values were calculated between controls and patients by Chi square test except where noted.cGrades 1�C4.dGrades 3 and 4 only.eP-value calculated by Fisher's exact test. Statistically significant differences (
创建时间：
2015-12-02
