University of Colorado Health Sciences Center, Denver, CO, USA. E-mail: barbara.kelly@uchsc.edu

Denver Health and Hospital, Denver, CO USA. E-mail: Greg.Gutierrez@dhha.org

University of Colorado Health Sciences Center, Denver, CO, USA. laura.hansen@uchsc.edu

Del Norte Community Health Center, Crescent City, CA, USA. pdgrossman@yahoo.com