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Zygosity diagnosis in young twins by parental report.
Rietveld MJ, van Der Valk JC, Bongers IL, Stroet TM, Slagboom PE, Boomsma DI. Rietveld MJ, et al. Among authors: van der valk jc. Twin Res. 2000 Sep;3(3):134-41. doi: 10.1375/136905200320565409. Twin Res. 2000. PMID: 11035485 Free article.