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                            [content] => - *! There are no approved drugs for chronic sensorineural hearing loss, but the combination of CHIR99021 and valproic acid (FX-322) has shown promise in regenerating ear hair cells in laboratory settings.*!  
- *! The study involved testing the drug's distribution and elimination in guinea pigs, followed by human trials assessing safety and audiometric effects after administering FX-322 to individuals with chronic hearing loss.*!  
- *! Results indicated that FX-322 was well tolerated in humans, with some patients experiencing significant improvements in word recognition, suggesting it could be an effective treatment option.*!  
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