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We thank J. C. Bartonek, R. R. Cox, M. Cronin, C. R. Ely, P. L. Flint, K. E. Gamble, J. B. Grand, R. J. Greenwood, A. Hancock, F. A. Johnson, G. L. Krapu, G. W. Kramer, R. McLandress, R. Migoya, A. Perkins, J. Ringelman, D. E. Sharp, and R. West for use of unpublished data. D. C. Duncan, J. B. Grand, R. G. Greenwood, D. A. Haukos, and G. L. Krapu provided valuable comments to improve the manuscript.