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Van Der Burgt CJ, Merkx GF, Janssen AH, Mulder JC, Suijkerbuijk RF, Smeets DF.Van Der Burgt CJ, et al. Among authors: smeets df.J Med Genet. 1992 Oct;29(10):739-41. doi: 10.1136/jmg.29.10.739.J Med Genet. 1992.PMID: 1433237Free PMC article.