Source:
Gesundheitswesen (Bundesverband der Arzte des Offentlichen Gesundheitsdienstes (Germany)) [Gesundheitswesen] 2010 Dec; Vol. 72 (12), pp. 897-903. Date of Electronic Publication: Publisher: Thieme Country of Publication: Germany NLM ID: 9204210 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1439-4421