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van Herwaarden CL, Binkhorst RA, Fennis JF, van t'Laar A.van Herwaarden CL, et al. Among authors: binkhorst ra.Br Med J. 1977 Apr 16;1(6067):1029. doi: 10.1136/bmj.1.6067.1029.Br Med J. 1977.PMID: 322808Free PMC article.Clinical Trial.No abstract available.