Boelen, Avan Veen, MVerkerk, PHDiependaal, GLoeber, GElvers, BEndert, E2025-03-242025-03-2420132358806110.1016/j.cca.2013.04.004https://rivm.openrepository.com/handle/10029/647188Measuring free thyroxine levels in neonatal heel-prick samplesArticleClin Chim Acta 2013; 423C:51-52025-03-24