Data Supplement

Two tables and methods; three Word documents.

Files in this Data Supplement:

• E1 - Table E-1. Phenotype and genotype information on 4 ET families where there is possible cosegregation of the G allele with ET phenotype; Word document.
• E2 - Table E-2. Comparison of genotype frequency between affected and non affected individuals in 16 ET Families; Word document.
• E3 - Methods; Word document.