Monetary inducement to research participation.
D026689:Ethical Analysis; D028744:Ethics Committees, Research; D004992:Ethics, Medical; D006805:Human Experimentation; D006801:Humans; D007258:Informed Consent; D009042:Motivation; D033281:Nontherapeutic Human Experimentation; D026706:Paternalism; D026684:Personal Autonomy; D012106:Research; D035842:Research Subjects; D035844:Researcher-Subject Relations; D018570:Risk Assessment