1988
The relationship between obsessive-compulsive disorder and Tourette's syndrome: a twin study.
Walkup JT, Leckman JF, Price RA, Hardin M, Ort SI, Cohen DJ. The relationship between obsessive-compulsive disorder and Tourette's syndrome: a twin study. Psychopharmacology Bulletin 1988, 24: 375-9. PMID: 3153496.Peer-Reviewed Original Research
1986
Gilles de la Tourette's syndrome: tics and central nervous system stimulants in twins and nontwins.
Price R, Leckman J, Pauls D, Cohen D, Kidd K. Gilles de la Tourette's syndrome: tics and central nervous system stimulants in twins and nontwins. Neurology 1986, 36: 232-7. PMID: 2868428, DOI: 10.1212/wnl.36.2.232.Peer-Reviewed Original Research