摘要：The protection of human research subjects in clinical studies is regulated by international guidelines and national laws. Research Ethics Committees play an important role here, as they review the documentation for clinical studies under consideration of ethical aspects. This documentation includes an exclusion or wash-out period which designates when study subjects may not have participated in another study or be allowed to take part in a future one within a specified time period. However not all research subjects comply with their applicable exclusion period. This prohibited multi-participation in clinical studies is known as ‘research subject tourism,’ ‘clinical study overlapping’, or ‘guinea-pigging’. This practice brings with it additional risks for the research subject and the integrity of the research being conducted. No comprehensive data are available to demonstrate exactly how many research subjects participate in overlapping multiple studies. However, the number of them who ‘travel’ from one study to another seems to be significant. Preventing this practice is a matter of concern for ethics committees, but the responsibility for protecting research subjects in this respect apart from approving the ethics of a wash-out period and recruiting from a specific pool or database of patients is solely that of the investigating physician. But how can the investigating physician be certain that a research subject complies with their exclusion period? An international data bank for research subjects who have participated, or are participating, in clinical studies, is a measure that would serve to prevent prohibited multi-participation in clinical studies and thereby protect the research subject, the investigating physician and their institution. VIP Check, International, which was founded by the author in 1990, is an example of such a data bank. This article examines the existence of prohibited multi-participation in clinical studies, the additional risk this practice of itself poses to the research subjects and the integrity of clinical studies, and how this practice might best be reduce or even eliminated through use of an international data bank of research subjects such as that of VIP Check.
关键词：research subject ; research subject data bank ; clinical study ; prohibited multiple-participation in clinical study ; risks in clinical studies ; research subject tourism ; guinea-pigging ; cllinical study overlapping ; ethics committees
