C. Fijen, E. Kuijper, M. te Bulte, M. Daha, and J. Dankert. Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America, 28 (1):
98--105(January 1999)PMID: 10028078.
M. Dworkin, L. Park, and S. Borchardt. Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America, 44 (6):
810--6(March 2007)PMID: 17304452.
J. Reed, J. Thistlethwaite, and J. Huppert. The Journal of Adolescent Health: Official Publication of the Society for Adolescent Medicine, 41 (1):
14--18(July 2007)PMID: 17577529.