Hillarby, M C Molecular characterisation of C4 null alleles found in Felty's syndrome. [electronic resource] - Annals of the rheumatic diseases Oct 1990 - 763-7 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't ISSN: 0003-4967 Standard No.: 10.1136/ard.49.10.763 doi Subjects--Topical Terms: AllelesChromosome DeletionComplement C4--geneticsComplement C4a--geneticsFelty Syndrome--geneticsHumansNucleic Acid HybridizationPedigreePolymorphism, Restriction Fragment LengthSteroid 21-Hydroxylase--genetics