From the Department of Epidemiology, Erasmus MC, Rotterdam, The Netherlands.
Editor’s Note: A related article appears on p. 350.
Supported by an NWO/ZonMW (Netherlands Organization for Scientific Research) Veni Grant (91617066).
Disclosure: The author reports no conflicts of interest.
Correspondence: Sonja A. Swanson, Department of Epidemiology, Erasmus MC, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands. E-mail: firstname.lastname@example.org.