Humoral and Cellular CMV Responses in Healthy Donors; Identification of a Frequent Population of CMV-Specific, CD4+ T Cells in Seronegative Donors. - Loeth, Nina; Assing, Kristian; Madsen, Hans O.; Vindeløv, Lars; Buus, Soren; Stryhn, Anette (PLoS ONE, 2012)