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It takes alot of dedication and time to stay on top of all the assignments . In this way information on the biological relevancy of differentially expressed genes , as identified by micro-array experiments , can be obtained with minimal user intervention and time investment . Then there are the issues of work / life balance and time off . A national paid maternity leave scheme would go some way to addressing this disadvantage and compensating for the period of childbirth and time shortly after when women take time off work or reduce their labour force activity . In the interim , MSHA wants your comments on data for establishing an appropriate conversion factor and time period for phase-in of the final limit , technological implementation issues and the cost and benefits of the rule .