[1] ECOLE MED PARIS, INST PROGENESE, PARIS, FRANCE
[2] IST BIOL GEN & GEN MED, I-27100 PAVIA, ITALY
[3] CTR REG TRANSFUS SANGUINE & GENET HUMAINE, GUILLAUME, FRANCE
[4] OSPED CIRCOLO, VARESE, ITALY
[5] OSPED CIVILE, PORDENONE, ITALY
[6] UNIV MILAN, OSTET MANGIAGALLI CLIN, I-20133 MILAN, ITALY
[7] HOKKAIDO UNIV, SCH MED, DEPT PEDIAT, SAPPORO, HOKKAIDO 060, JAPAN
[8] LEIDEN STATE UNIV, DEPT HUMAN GENET, 2312 AV LEIDEN, NETHERLANDS
[9] HOP NECKER, CYTOGENET LAB, F-75730 PARIS 15, FRANCE
[10] DALHOUSIE UNIV, ATLANTIC RES CTR MENTAL RETARDAT, HALIFAX, NS, CANADA
[11] DALHOUSIE UNIV, IZAAK WALTON KILLAM HOSP CHILDREN, HALIFAX B3J 3G9, NS, CANADA
[12] UNIV GOTTINGEN, INST HUMAN GENET, D-3400 GOTTINGEN, FED REP GER
[13] KUSHIRO RED CROSS HOSP, DEPT PEDIAT, KUSHIRO, JAPAN
[14] CHR GRENOBLE, CYTOGENET LAB, F-38043 GRENOBLE, FRANCE
[15] UNIV GRENOBLE, GRENOBLE, FRANCE
[16] ALBERD I DUPONT INST, WILMINGTON, DE USA
[17] YAMAGUCHI UNIV, SCH MED, DEPT PEDIAT, UBE, YAMAGUCHI 755, JAPAN
[18] UNIV HELSINKI, CENT HOSP, PRENATAL GENET LAB, SF-00170 HELSINKI 17, FINLAND
[19] CENT HOSP CHAMBERY, ANAL MED LAB, CHAMBERY, FRANCE
[20] UNIV COLORADO, SCH MED, DENVER, CO 80202 USA
[21] UNIV FERRARA, INST PUERICULTURA & MED NEONATALE, I-44100 FERRARA, ITALY
[22] ERASMUS UNIV, DEPT CELL BIOL & GENET, 3000 DR ROTTERDAM, NETHERLANDS
[23] MED HSCH LUBECK, INST HUMANGENET, D-2400 LUBECK, FED REP GER
[24] FREE UNIV BERLIN, INST HUMANGENET, D-1000 BERLIN 33, FED REP GER
[25] KAROLINSKA INST, DEPT MED CELL GENET, S-10401 STOCKHOLM 60, SWEDEN
[26] SICHUAN MED COLL, DEPT MED GENET, SICHUAN, PEOPLES R CHINA