Questionnaires and pedometers each have weaknesses but are the cheapest and easiest to use measurement methods for large-scale studies ... associations examined between activity and surrogate markers ...

All individuals were genotyped for 23 highly polymorphic markers. Positive evidence for linkage was found for a 10-cM region on the long arm of chromosome 20q13.1 q13.2 between markers D20S119 and ...