aCambridge Health Alliance, 1493 Cambridge Street, Cambridge, MA 02139, USA
bHarvard Medical School, 25 Shattuck Street, Boston, MA 02115, USA
cHarvard School of Public Health, 665 Huntington Avenue, Boston, MA 02115, USA
dUniversity of Michigan School of Public Health, 109 S. Observatory Street, Building 1–6667, Ann Arbor, MI 48109, USA
eWHO European Centre for Environment and Health, Hermann-Ehlers-Str.1053113 Bonn, Germany
fOsher Research Center of Harvard Medical School, 401 Park Drive, Boston, MA 02215, USA
gBeth Israel Deaconess Medical Center, 330 Brookline Avenue, Boston, MA 02215, USA
hTufts University School of Medicine, 145 Harrison Avenue, Boston, MA 02111, USA
*Corresponding author. Address: Cambridge Hospital, Macht Center, Room 427, 1493 Cambridge Street, Cambridge, MA 02139, USA. Tel.: +1 617 665 1580; fax: +1 617 665 1672.
E-mail address:rgoldma[email protected]
Submitted November 2, 2008; revised January 13, 2010; accepted January 22, 2010.
