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Franken AA, Derkx FH, Schalekamp MA, Man in t'Veld AJ, Hop WC, van Rens EH, de Jong PT.Franken AA, et al. Among authors: derkx fh.J Hypertens Suppl. 1988 Dec;6(4):S461-3. doi: 10.1097/00004872-198812040-00145.J Hypertens Suppl. 1988.PMID: 3071586
van den Meiracker AH, Admiraal PJ, Derkx FH, Kleinbloesem C, Man in 't Veld AJ, van Brummelen P, Mulder P, Schalekamp MA.van den Meiracker AH, et al. Among authors: derkx fh.J Hypertens. 1993 Aug;11(8):831-8. doi: 10.1097/00004872-199308000-00010.J Hypertens. 1993.PMID: 8228207Clinical Trial.