Parkinson's DiseaseNEJM 339:1044-1053,1130-1143, Lang,A.E.&Lozano,A.M., 1998
The DystoniasBMJ 300:139-144, Marsden,C.D.&Quinn,N.P., 1990
L-tryptophan and Eosinophilia-Myalgia Syndrome in New MexicoLancet 335:645-648, Eidson,M.,et al, 1990