This is also consistent with reports finding no correlations in PD patients between their LID profiles and the concentration of striatal 5HT (Calon et al. 2003; Kish et al. 2008; Cheshire et al. 2015), striatal SERT, or the number of 5HT neurons in the dorsal raphe nuclei (Cheshire et al. 2015). The gene discussed is HTR5A; the disease is Parkinson disease.