Protracted withdrawal syndrome refers to symptoms persisting for months or even years. It is believed that the protracted withdrawal effects are due to persisting neuroadaptations. Mescaline may cause Hallucinogen persisting perception disorder. There are still persisting inequalities between levels of sexual experience between females and males. However, there are persisting disparities in terms of spread across disciplines. I generals are often portrayed as callously persisting in repeated hopeless attacks against trenches. Head injury can give rise to either transient or persisting amnesia. Still other versions have Nimrod persisting in his rebellion against God, or resuming it. Vercingetorix overall persisting logistics policy, however, demonstrates a significant level of strategic thinking. He may attribute a different persisting identity to me. There's also support for invisible indexes and persisting of global system variables. Pask presented models based on Knot theory knots which described minimal persisting concepts. It therefore formally grounds beginning, persisting and ending. Review of persisting oral ulcerations for more than 3 weeks is recommended. In the 1970s Stafford Beer considered self-organization necessary for autonomy in persisting and living systems.