Symptom dimensions in OCD: Item-level factor analysis and heritability estimates

Hilga Katerberg, Kevin L. Delucchi, S. Evelyn Stewart, Christine Lochner, Damiaan A.J.P. Denys, Denise E. Stack, J. Michael Andresen, J. E. Grant, Suck W Kim, Kyle A. Williams, Johan A. Den Boer, Anton J.L.M. Van Balkom, Johannes H. Smit, Patricia Van Oppen, Annemiek Polman, Michael A. Jenike, Dan J. Stein, Carol A. Mathews, Danielle C. Cath