Friday, November 21, 2008 - 1:54AM EST

United States

Oklahoma

Name of AuthorInstitutional Affiliation
Ramakrishnan KDepartment of Family and Preventive Medicine, University of Oklahoma Health Sciences Center, Oklahoma City 73104, USA. kramakrishnan@ouhsc.edu
Scheid DCDepartment of Family and Preventive Medicine, University of Oklahoma Health Sciences Center, Oklahoma City 73104, USA.