Cholesterol - A waxy, fat-like substance that occurs naturally in all parts of the body. Your body needs some cholesterol to work properly, but too much can cause serious health problems.
CPK - Creatine phosphokinase - An enzyme present mainly in muscle. A CPK blood test is used to determine if someone has muscle damage.
DNA - Deoxyribonucleic acid - The material that contains the genetic instructions used in the development and functioning of all known living organisms.
Genes - A section of DNA that determines a particular characteristic of an organism.
Genetic association study - The discovery of genetic factors influencing the occurrence of a disease.
GPRD - General Practice Research Database - The world's largest computerised database of anonymised medical records, taken from GP practices around the UK.
IEC - Independent Ethics committee - An independent body, constituted of medical professionals and non-medical members, whose responsibility it is to ensure the protection of the rights, safety and well-being of human subjects involved in a trial.