Pediatr Infect Dis J 2013 Nov;32(11):1245-56
From the *Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland; †Center for Aging Sciences (Ce.S.I.), G. d'Annunzio University, Chieti, Italy; ‡Institute of General Practice and Health Services Research, University of Zürich, Zürich, Switzerland; §Department of Medical, Oral and Biotechnological Sciences, G. d'Annunzio University Foundation, Chieti, Italy; and ¶Department of Vascular Medicine, Academic Medical Center, Amsterdam, the Netherlands.