<qa>  What is the TSH level within the normal range of patients who have thyroidal dysfunction?- Patients whose TSH level is out of the normal range and who have thyroidal dysfunction requiring drug therapy at the time of Visit 1Screening However, those who have been taking thyroid hormone at a fixed dose since previous 4 weeks prior to Visit 1Screening and whose TSH level is within the normal range can participate in the study. 