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Der Chirurg > 2003 > 74 > 11 > 1026-1033
Journal of Urban Health > 2003 > 80 > 1 > 106-114
Health Care Analysis > 2002 > 10 > 1 > 67-85
Annals of Oncology > 2000 > 11 > 9 > 1091-1096
European Journal of Epidemiology > 2000 > 16 > 1 > 87-91