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. Author manuscript; available in PMC: 2010 Feb 1.
Published in final edited form as: Biol Psychol. 2008 Oct 21;80(2):226–239. doi: 10.1016/j.biopsycho.2008.10.002

Figure 1. Theoretical models of unique and shared genetic etiologies of PA and RN.

Figure 1

A. PA and RN are different manifestations of the same underlying process with a common/shared etiology.

B. PA and RN are distinct processes with distinct etiologies.

C. PA and RN are phenomenologically and etiologically partially overlapping processes.