Scope and Contents This film, narrated by Dr. Kolff, shows how a wearable artificial kidney could be compatible with the daily life of patients and demonstrates how the machine functions. The credits for the film list W. J. Kolff, M.D., director; S. J. Davidson, Ph. D., 'WAK designer;' E. Thor, M.D.; E Thor, M.D.; E. C. Bullock; D. Vandura; S. Hughes; H. R. Smith and D. Guestaveson. Ten minutes.