Assertion: lemon balm's effect | /r/HasProperty | melissa officinalis l.
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text: https://www.ncbi.nlm.nih.gov/pubmed/24199972 Effects of Herbal combination (Melissa officinalis L. and Nepeta menthoides Boiss. & Buhse) on insomnia severity, anxiety and depression in insomniacs: Randomized placebo controlled trial, Integrative Medicine Research, US National Library of Medicine, National Institutes of Health.