[1] Univ Chicago, Chicago, IL 60637 USA
[2] Univ Illinois, Chicago, IL 60680 USA
[3] Yale Univ, New Haven, CT 06520 USA
[4] Harvard Univ, Sch Med, Cambridge, MA 02138 USA
[5] Cornell Univ, Ithaca, NY 14853 USA
[6] Brown Univ, Providence, RI 02912 USA
[7] Univ Saskatchewan, Saskatoon, SK, Canada
[8] Johns Hopkins Univ, Baltimore, MD 21218 USA
[9] Catholic Univ Amer, Washington, DC 20064 USA
[10] Univ Wisconsin, Madison, WI 53706 USA
[11] Univ N Carolina, Chapel Hill, NC 27515 USA
[12] Eastman Kodak Co, Rochester, NY 14650 USA
[13] Univ Gottingen, Gottingen, Germany
[14] TH Darmstadt, Darmstadt, Germany
[15] Princeton Univ, Princeton, NJ USA
[16] Universal Oil Prod Co, Riverside, IL USA
[17] George Washington Univ, Washington, DC 20052 USA
[18] CALTECH, Pasadena, CA USA
[19] Stanford Univ, Stanford, CA 94305 USA
[20] NYU, New York, NY USA