Introduction: mass screening, health technology assessment, and health policy in some European countries.

Objective: The series of papers in this issue was developed to examine the use of health technology assessment in policies toward prevention-specifically toward mass screening-in European countries. The papers actually examined three screening strategies: mammography screening for breast cancer, prostate-specific antigen screening for prostate cancer, and routine ultrasound in normal pregnancy.

Methods: Papers were sought from the member states of the European Union, plus Switzerland.