Critics of self-experimenters point to other less savoury motivations such as simple self-aggrandisement. Some scientists have resorted to self-experiment to avoid the "red tape" of seeking permission from the relevant ethics committee of their institution. Werner Forssmann was so determined to proceed with his self-experiment that he continued with it even after permission had been denied. He was twice dismissed for this activity, but the importance of his work was eventually recognised in a Nobel Prize. Some researchers, apparently, even believe that self-experimentation is not permitted. However, this is not true, at least in the United States where the same rules apply regardless of who the subject of the experiment is.