Table 1. Patients from study group included in follow-up group and response rates.

	Number of patients	Number of patients	Total	%
	DC 1	DC 2
Study group	114	127	241
Consent forms	80	60	140	58
Letters to responsible GP	77	50	127	53
Patients not registered with a GP	3	10	13
Patients not registered at listed GP	14	11	25
No answer from GP	12	6	18
Follow-up group	51	33	84	35