Erzegovesi S, Riboldi C, Di Bella D, Di Molfetta D, Mapelli F, Negri B, Tenace M, Bellodi L. Bulimia nervosa, 5-HTTLPR polymorphism and treatment response to four SSRIs: a single-blind study. J Clin Psychopharmacol. 2004 Dec;24(6):680–2. doi: 10.1097/01.jcp.0000144896.83352.35. PMID: 15538139.