Respiratory health, allergies, and the farm environment: design, methods and enrollment in the observational Wisconsin Infant Study Cohort (WISC): a research proposal oleh Christine M. Seroogy, Jeffrey J. VanWormer, Brent F. Olson, Michael D. Evans, Tara Johnson, Deanna Cole, Kathrine L. Barnes, Tamara Kronenwetter Koepel, Amy Dresen, Jennifer Meece, Ronald E. Gangnon, Matthew C. Keifer, Casper G. Bendixsen, James E. Gern, the Entire WISC Study Team