tokens: A relationship between the immunological changes and the disease stage was discovered : the index of the 3H - thymidine incorporation was found to be 67 . 9 at the stage of disease exacerbation , and 208 . 8 at the stage of remission ; the complement titre reached , respectively , 46 . 64 + / - 5 . 28 and 112 . 0 + / - 6 . 0 units per ml .