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The latter assessment would require the study to continue , to track the success of students who had high versus low grades in the prerequisite courses . In an attempt to simplify the fold recognition problem and to increase the reliability of predictions , we approached a reduced fold recognition problem , when the choice is limited to two folds . This situation can stretch out indefinitely , because as part of the arrangement , the IRS often asks you to waive the statute of limitations . ABSTRACT : Researchers at Lawrence Berkeley National Laboratory have isolated , purified and begun to characterize a novel factor that is likely to enhance the healing of injuries involving damage to tendons and ligaments .