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"You cant undo the damage that has already been done, but you can avoid causing further damage," said first author Yoonhoo Chang, a graduate student at WashUMed

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Each subcode has a specific clinical trigger that the documentation must support

For people who smoke, their lives are full of smoking triggers

* The raw materials is fed forward step by step

Cognitive problems Long-term PCP abuse may lead to dangerous cognitive problems, including: Memory problems Perceptions Impaired judgment Difficulty with attention and focus Hallucinations Delusional thinking PCP abuse can change the structure of a persons brain, causing significant, long-term cognitive challenges