Glycogen storage disease type II: frequency of three common mutant alleles and their associated clinical phenotypes studied in 121 patients.

ease, including neuropsychological testing; (3) research to obtain insight into people's knowledge, beliefs, feelings, and behaviour related to genetic disease, genetic risk, and genetic testing. "Prediction" of how many people will use specific genetic tests and delineation of predictor variables is part of the latter role. We want to stress that the mere prediction of future uptake rates or other preventive behaviour is not the main purpose of our study. The study is aimed at a description of adolescents' present opinions about genetic risk information, prenatal diagnosis, and