IgA and ring-18 chromosome.
D002648:Child; D002869:Chromosome Aberrations; D002902:Chromosomes, Human, 16-18; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics*; D008297:Male; D012463:Saliva / Q000032:analysis; D005719:gamma-Globulins / Q000032:analysis* / Q000097:blood
D005719:gamma-Globulins