Animal cell cultures: Risk Assessment and biosafety recommendations, Pauwels, Katia, Van Vaerenbergh Bernadette, Do Thi Chuong Dai, Berghmans L., Waeterloos Geneviève, Van Bockstaele D., Dorsch-Hasler K., and Sneyers Myriam , Appl.Biosaf., 0/0/2007, Volume 12, Issue 1, Number 38, p.26 - 38, (2007)