21.   In clinical practice a new procedure becomes accepted treatment when it is offered by a critical mass of physicians or centres.

22.   Clinical practice and public health often differ over the rationing of health care.

23.   How much control of clinical practice should be included in the monitoring schemes?

24.   The results relate to well-controlled, essentially ideal conditions but may reveal little about the effectiveness or safety of a procedure in widespread use in ordinary clinical practice.

25.   Nevertheless it promises better information to guide patients, guidelines for clinical practice and wiser decisions by policy-makers and purchasers of health care.

26.   The latest findings may not make much difference to clinical practice in this country.

27.   As health-care providers across the country have incorporated the use of AZT into their clinical practices, perinatal HIV transmission has dropped dramatically.

28.   Aimed at stopping HIV patients from getting AIDS disease symptoms, it will likely be brought into clinical practice in the next couple years, she said.

29.   But clinical practice was not his first love, Sokoloff said, and he soon returned to the institute and to basic research.

30.   But it can be difficult to put any new findings into clinical practice.