Fig. 2

N1–N6 are 6 nights of intervention with zopiclone/placebo. The initial dose is zopiclone/placebo 3.75 mg (dose level 1). Dose level 2 is 5 mg zopiclone/placebo, and dose level 3 is 7.5 mg zopiclone/placebo
N1–N6 are 6 nights of intervention with zopiclone/placebo. The initial dose is zopiclone/placebo 3.75 mg (dose level 1). Dose level 2 is 5 mg zopiclone/placebo, and dose level 3 is 7.5 mg zopiclone/placebo