Sleep Balance TestTest for the circadian rhythm of melatonin in concert with urinary free cortisol (UFC) to assess sleep wake cycle dysfunction. Urine is collected on filter strips at 4 time points throughout the day representative of the peaks and troughs of melatonin and cortisol production. The first urine void represents the 8 hours or so of overnight peak melatonin production, eliminating the need for middle of the night collection. Results can be expected 5 7