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Reversed-phase HPLC frequently cannot either, since isomers may co-elute and an area-percent figure identifies peaks rather than conformations
21 On the other hand, a study that followed 4,746 individuals with tinnitus for four years found 18.3% of cases resolved, 9% improved, 9% worsened, and about 64% experienced no change, 22 and a study in which a questionnaire was administered to 528 tinnitus patients found 25% reported the severity of their tinnitus had increased since its onset
Herrera J, Ferrebuz A, MacGregor EG, Rodriguez-Iturbe B
P21 has similarly shown the ability to reverse dendritic and synaptic density loss caused by traumatic brain injury, restoring the physical architecture of neural connections that had been damaged
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