TY - GEN AU - Olsen,J AU - Melbye,M AU - Sørensen,T I AU - Aaby,P TI - [Center for epidemiologic basic research] SN - 0041-5782 PY - 2001///0419 KW - Denmark KW - Epidemiology KW - education KW - Humans KW - Research N1 - Publication Type: Journal Article ER -