1. Influence of melatonin on sleep in humans;Cramer;Sleep,1973
2. Clinical importance of melatonin;Wetterberg;Prog Brain Res,1979
3. Insomnia associated with valerian and melatonin usage in the 2002 national health interview survey;Bliwise;Sleep,2007
4. Use of complementary health approaches among children aged 4–17 years in the United States: national health interview survey, 2007–2012;Black;Natl Health Stat Rep,2015
5. Global melatonin market is expected to reach USD 1,300.0 million in 2019: transparency Market research;Newswire,2014