serum samples

A protocol for prospective studies of 25-hydroxyvitamin D, leptin and body mass index in relation to cutaneous melanoma incidence and survival
Jo Steinson Stenehjem, Tom K Grimsrud, Judith R Rees, Linda Vos, Ronnie Babigumira, Marit B Veierød, Trude Eid Robsahm

BMJ Open Jun 2017, 7 (6) e014829; DOI: 10.1136/bmjopen-2016-014829

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serum samples