1. Acute pain management: Operative or medical procedures and trauma;Agency for Health Care Policy and Research,1992
2. Visual analogue measurement of pain;Campbell;The Ulster Medical Journal,1990
3. Standardization of the visual analogue scale;Cline;Nursing Research,1992
4. Statistical power analysis for the behavioral sciences;Cohen,1977
5. The use of relaxation and distraction to reduce psychological stress during dental procedures;Corah;Journal of the American Dental Association,1979