We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleProtein source tryptophan versus pharmaceutical grade tryptophan as an efficacious treatment for chronic insomnia.AuthorsHudson C; Hudson SP; Hecht T; MacKenzie JPublicationNutritional neuroscience, 2005, Vol 8, Issue 2, p121ISSN1028-415xPublication typearticleDOI10.1080/10284150500069561