9. E. Beutler 



10. A. Bloom 



11. D. Bootsma 



12. D. Borgaonkar 



13. A. Boue 



14. P. Bowen 



15. W. Breg 



16. J. Brown 



17. P. Buchanan 



18. W. Bucknall 



Dept. of Med., City of Hope Med. Cntr., 



1500 East Duarte Rd., Duarte, Calif. 91010 



Dept. of Ped., 1507 Black Bldg. , Coll. of 



Physicians and Surgeons of Columbia Univ., 



630 W. 168th St., New York, N.Y. 10032 



Dept. of Cell Biology and Genetics, Erasmus 



Universitat Rotterdam, Postbus 1738, 



Rotterdam, The Netherlands 



Div. of Med. Genetics, Dept. of Med., The 



Johns Hopkins Univ. Sch. of Med., Baltimore, 



Md. 21205 



Centre d'Etudes de Biologie Prenatale, 



Chateau de Longchamp - Carrefour de Longchamp 



Bois de Boulogne - 75016 Paris, France 



Dept. of Ped., 4-120 Clinical Sciences Bldg., 



Faculty of Med., Univ. of Alberta, Edmonton, 



Alberta, Canada T6G 2E1 



Southbury Training School, Southbury, Conn. 



06488 



Dept. of Human Genetics, Medical College of 



Virginia, Richmond, Va. 



Director of Cytogenetics, Dept. of Ped., Sch. 



of Med., Univ. of North Carolina at Chapel 



Hill, Chapel Hill, N.C. 27514 



Med. Genetics Sect., Dept. of Med., Baylor 



Coll. of Med., Houston, Texas 77025 



134 



