Twins and the study of rater (dis)agreement.
Bartels, Meike; Boomsma, Dorret I.; Hudziak, James J.; van Beijsterveldt, Toos C. E. M.; van den Oord, Edwin J. C. G.; Psychological Methods, 2007, vol. 12, issue 4, p 451, ISSN 1082989X. ISBN 1082989X.
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