Visits from the Beysa were common enough, and more often than not, involving subjects of a trivial nature.

They are nearly always serious and may involve strongly emotional subjects, for example cruelty.

Everyone agrees there should be strict limits when research involves human subjects.

This involves subjects such as support groups and counselling programs.

The study was influential in shaping public perceptions of research involving human subjects.

The federal government provides funds for a vast complex of experiments that involve human subjects.

Even when experimental research does not directly involve human subjects, it may still present ethical concerns.

These studies involved subjects who had generally been on the supplements for 5 to 6 months or less.

This season, in New York alone, a variety of productions involve scientific subjects.

This prediction has been confirmed in studies involving human subjects.