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Cognitive flexibility, another key aspect of executive function, is rarely investigated in the context of opioid drug studies

GHK-Cu and copper tripeptide-1 refer to the same Gly-His-Lys-Cu(II) molecule

Conflicts of Interest The authors declare that there are no conflicts of interest

However, desiccants represent a secondary measure and cannot substitute for appropriate temperature control

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You can improve your sleep environment by: Setting a regular bedtime and wake-up time Planning a period of quiet activity before going to bed, avoiding exercise or mentally stimulating activities Avoiding caffeine from the afternoon onward, and limiting alcohol and large meals in the evening Only use your bedroom for sleep