I can jump in and take that question first.
Certainly the registries are meant to define or identify those individuals who have had exposures and to keep a list, because as the science or the state of research improves, there may be care or an intervention developed that would require contacting veterans with certain exposures.
Some information can be used for research purposes, but it's very closely guarded. In order for an investigator to use this data, it would have to be de-identified. They would have to go through a data transfer agreement, ensuring privacy and information security. So it's a bit of both: we want to promote health care as well as promote the state of the science.