Who is going to have time to enter patients in the registry? is there funding to pay for study nurses? or is it entirely voluntary? Do I need to stay ANOTHER half hour after my ER shift, and volunteer more of my private life, in the name of someone else's research?
Additionally registries are usually NOT done by manufacturers. Tumor Registry is usually funded by NIH or Cancer Group, or group within an academic university, and there are funds to pay nurses to enter patients in data base. Same for Trauma Registry.