Jansen, EHJMBeekhof, PKCremers, JWJMSchenk, E2025-03-212025-03-212012https://rivm.openrepository.com/handle/10029/646320Long-term (in)stability of folate and vitamin B12 in human serumArticleClin Chem Lab Med 2012; 50(10):1761-32025-03-21