RESEARCH METHOD. Patient recruitment. Patients enrolled in the NMD clinic at children's hospital will initially be informed about the study by letter signed by the director of the NMD clinic, Dr Selby. At their next routine clinic visit, they will be approached by one of the two PIs (Dr Seear or Dr Selby). They will be given more information about the study and a handout covering the details. Once they have had time to consider the information, they will be invited to enroll in the study.