1. Department
of Geography, Central Michigan University, Dow Science, Mount Pleasant, Michigan 48859 United States
2. Departments
of Pharmacology and Toxicology and Social and Preventive Medicine, Farber Hall, University at Buffalo, Buffalo, New York 14214 United States
3. Department
of Geography, University at Buffalo, Wilkeson Hall, Buffalo, New York 14261 United States
4. National
Center for Geographic Information and Analysis, University at Buffalo, Buffalo, New York 14261 United States
5. Department
of Biostatistics, Farber
Hall, University at Buffalo, Buffalo, New York 14261 United States