RECOVER-SLEEP: Platform Protocol, Appendix_B (CPSD)

Melatonin dosing will be one tablet of 3 mg immediate release daily consumed 2 hours before the participant's desired bedtime, which is defined as the time at which the participant tries to fall asleep.

Melatonin placebo dosing will be one placebo tablet once daily consumed 2 hours before the participant's desired bedtime.

TL will be delivered similarly to both active and placebo groups, but the circadian stimulus (the amount of light) will be different, albeit practically unidentifiable to participants.

TL will be delivered similarly to both active and placebo groups, but the circadian stimulus (the amount of light) will be different, albeit practically unidentifiable to participants.