Christine M. Kleinert Institute for Hand and Microsurgery, Louisville, Kentucky, U.S.A. (SCHEKER) (SCHROEDER)

Address correspondence and reprint requests to Dr. Luis R. Scheker, Christine M. Kleinert Institute for Hand and Microsurgery, Suite 850, 225 Abraham Flexner Way, Louisville, KY 40202-3840, U.S.A.

Acknowledgments: We thank Elaine Bammerlin for drawing the detailed figures and Stan Goldman, Ph.D., for editing the text.