[posted as supplied by author]

Appendix: Keywords and Subject Headings used in Searches*
melatonin	nocturnal eating (drinking) syndrome
melatonine	time-zone change syndrome
5-methoxy-N-acetyltryptamine	jet-lag
N-acetyl-5-methoxytryptamine	parasomnias
73-31-4 (CAS Registry Number)	confusional arousals
luzindole	rhythmic movement disorder
sleep	nocturnal leg cramps
sleep disorders	nightmares
dyssomnias	nocturnal paroxysmal dystonia
insomnia	sudden unexplained nocturnal death syndrome
narcolepsy	snoring
hypersomnia	congenital central hypoventilation syndrome
central alveolar hypoventilation syndrome	sudden infant death syndrome
periodic limb movement disorder	subwakefulness syndrome
circadian	fragmentary myoclonus
restless legs syndrome	terrifying hypnagogic hallucinations
* Complete search strategies are available from the corresponding author.