Ksenia Bystrova , Ann-Marie Widström , Ann-Sofi Matthiesen , Anna-Berit Ransjö-Arvidson , Barbara Welles-Nyström , Igor Vorontsov and Kerstin Uvnäs-Moberg
International Breastfeeding Journal 2007, 2:9doi:10.1186/1746-4358-2-9