title: High frequency of C4 "null" alleles in primary antiphospholipid syndrome.
authors: S
authors: S
authors: Bentolila
authors: V
authors: V
authors: Fremeaux-Bacchi
authors: L
authors: L
authors: Weiss
authors: J
authors: J
authors: Blouin
authors: M D
authors: MD
authors: Kazatchkine
authors: J C
authors: JC
authors: Piette
mesh_terms: D000328:Adult; D016736:Antiphospholipid Syndrome / Q000235:genetics*; D003181:Complement C4 / Q000235:genetics*; D004198:Disease Susceptibility; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010641:Phenotype
chemical_list: D003181:Complement C4