Huerta, Doris, et al. “Val108/158Met/Polymorphism/in/the/Catechol-Omethyl/Transferase/(COMT)/Dopaminergic/Gene/in/Mestizo/Peruvian/Population/and/Its/Importance/in/Neuropsychiatric/Studies”. Anales De La Facultad De Medicina, vol. 68, no. 4, Dec. 2007, pp. 321-7, https://doi.org/10.15381/anales.v68i4.1196.