1. Division of Genetics; Wadsworth Center; New York State Department of Health; Albany New York
2. The Cystic Fibrosis Center; Mount Sinai Beth Israel; New York New York
3. Cohen Children's Medical Center of New York; Great Neck New York
4. Departments of Pediatrics; Duke University, Durham; NC and State University of New York (SUNY) at Buffalo; Buffalo New York
5. Department of Biomedical Sciences; University at Albany; Albany New York
6. University Medical Center at Stony Brook; Stony Brook New York