Wilcox, M. A., Wyszynski, D. F., Panhuysen, C. I., Ma, Q., Yip, A., Farrell, J., & Farrer, L. A. (2003). Empirically derived phenotypic subgroups – qualitative and quantitative trait analyses. BioMed Central.

Wilcox, Marsha A., Diego F. Wyszynski, Carolien I. Panhuysen, Qianli Ma, Agustin Yip, John Farrell, et Lindsay A. Farrer. Empirically Derived Phenotypic Subgroups – Qualitative and Quantitative Trait Analyses. BioMed Central, 2003.

Wilcox, Marsha A., et al. Empirically Derived Phenotypic Subgroups – Qualitative and Quantitative Trait Analyses. BioMed Central, 2003.