Citation

Oxman AD, Flottorp S, Håvelsrud K, Fretheim A, Odgaard-Jensen J, Austvoll-Dahlgren A, Carling C, Pallesen S, Bjorvatn B. 2007. A televised, web-based randomised trial of an herbal remedy (Valerian) for insomnia. PLoS ONE 2(10):e1040.