31.   Controlled studies have since established that as little as a tenth of a milligram can hasten the onset of sleep, whatever the time of day.

32.   Duke would love to see controlled studies of these herbs.

33.   Dr. Robert Dorlan, of Spartanburg, is conducting a controlled study examining the effects of electromagnetic fields on a common form of arthritis.

34.   Eye doctors have used the treatments for many years although their safety and effectiveness have not been determined in a scientifically controlled study.

35.   Few prevention efforts targeted directly at this group have been evaluated in a controlled study, de Wit said.

36.   Ginger, long recognized as a gastrointestinal calmative, has been shown in controlled studies to be very helpful, even for carsick dogs and children.

37.   He and his colleagues called for a new series of carefully controlled studies to test the conclusions of their findings far more firmly.

38.   He said his group would convene an expert panel to develop new recommendations and a randomized controlled study.

39.   In general, little evidence from carefully controlled studies exists to support the use of alternative therapies for epilepsy.

40.   In controlled studies at three universities, athletes using creatine showed significantly more improvement in weightlifting performance than did placebo groups in identical training programs.