- Correspondence to C Mary Schooling, CUNY School of Public Health at Hunter College, 2180 Third Avenue, New York, NY 10035, USA;
- Received March 13, 2013
- Revised March 20, 2013
- Accepted March 29, 2013
- First published April 30, 2013.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.