title: Gelastic cataplexy in Niemann-Pick disease group C and related variants without generalized sphingomyelinase deficiency.
mesh_terms: D002385:Cataplexy / Q000175:diagnosis*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007845:Laughter; D008297:Male; D009542:Niemann-Pick Diseases / Q000175:diagnosis*; D010727:Phosphoric Diester Hydrolases / Q000172:deficiency*; D013108:Sphingomyelin Phosphodiesterase / Q000172:deficiency*
chemical_list: D010727:Phosphoric Diester Hydrolases; D013108:Sphingomyelin Phosphodiesterase