RT Journal
A1 Punnoose AR, Golub RM, Burke AE
T1 INsomnia
JF JAMA
JO JAMA
YR 2012
FD June 27
VO 307
IS 24
SP 2653
OP 2653
DO 10.1001/jama.2012.6219
UL http://dx.doi.org/10.1001/jama.2012.6219
AB 
Insomnia  is a sleep disorder that includes trouble falling asleep, staying asleep, or waking too early, resulting in daytime impairment. It is a common problem, usually occurring along with other diseases or emotional stress (comorbid insomnia ). It can also exist without other medical or mental health causes (primary insomnia ). Long-standing (chronic) insomnia can lead to daytime consequences such as fatigue or sleepiness, difficulty with thinking, and mood impairments, which can interfere with performance at school and work.