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2. orpha.net – Das Portal für seltene Krankheiten und Orphan Drugs. Karzinom, kutanes neuroendokrines.
http://www.orpha.net/consor/cgi-bin/OC_Exp.php?Expert=79140&lng=DE
. Zugegriffen: 11. Oktober 2017
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http://www.cancer.gov/types/skin/patient/merkelcell-treatment-pdq
. Zugegriffen: 11. Oktober 2017
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5. Skin Cancer Foundation. Merkel Cell Carcinoma – What is Merkel Cell Carcinoma?
http://www.skincancer.org/skin-cancerinformation/merkel/causes
. Zugegriffen: 11. Oktober 2017