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van den Berg J, Frenken FJ.van den Berg J, et al. Among authors: frenken fj.Ned Tijdschr Tandheelkd. 1993 Sep;100(9):399-400, 401-4.Ned Tijdschr Tandheelkd. 1993.PMID: 11917875Dutch.
van der Aalst CM, van Iersel CA, van Klaveren RJ, Frenken FJ, Fracheboud J, Otto SJ, de Jong PA, Oudkerk M, de Koning HJ.van der Aalst CM, et al. Among authors: frenken fj.Lung Cancer. 2012 Jul;77(1):51-7. doi: 10.1016/j.lungcan.2012.02.021. Epub 2012 Mar 27.Lung Cancer. 2012.PMID: 22459203