We wish to acknowledge the assistance of Lynzee Head, Andrew C. Ward, the Wireless RERC, the HERO (Human-Environment Regional Observatory) online Delphi System, Penn State University [http://hero.geog.psu.edu/eDelphi/]

This research supported by grant #H133E020720 and H133E010804 from the National Institute on Disability and Rehabilitation Research (NIDRR), U.S. Department of Education H133E010804. The opinions contained in this publication are those of the grantee and do not necessarily reflect those of the U.S. Department of Education.