Emily J Cherlin , Adel A Allam , Erika L Linnander , Rex Wong , Essam El-Toukhy , Heather Sipsma , Harlan M Krumholz , Leslie A Curry and Elizabeth H Bradley
Computers, Environment and Urban Systems (APR 2011) , Received 10 November 2010; revised 3 April 2011; accepted 5 April 2011. Available online 4 May 2011 doi:10.1016/j.compenvurbsys.2011.04.001