A ResearchSubject is a participant or object which is the recipient of investigative activities in a research study. A ResearchSubject is a participant or object which is the recipient of investigative activities in a research study. If the element is present, it must have either a @value, an @id, or extensions Identifiers assigned to this research subject for a study. The publication state of the resource (not of the subject). The dates the subject began and ended their participation in the study. Reference to the study the subject is participating in. The record of the person, animal or other entity involved in the study. A duration in the lifecycle of the ResearchSubject within a ResearchStudy. A significant event in the progress of a ResearchSubject. A group to which the subject is assigned. This group assignment is used for administration or analysis. Agreement to participate in a study as well as other research agreements, e.g. to acknowledge additional risks, to agree to a protocol deviation, or to agree to more invasive validation subsidies. A ResearchSubject is a participant or object which is the recipient of investigative activities in a research study. Identifies the aspect of the subject's journey that the state refers to. The date a research subject entered the given state. The date a research subject exited or left the given state. The reason for the state change. If coded it should follow the formal subject state model. A ResearchSubject is a participant or object which is the recipient of investigative activities in a research study. A specific event in the research subject's journey through a research study. The date/time when this milestone event was completed. A rationale that provides additional clarification for the milestone that was captured or documented.