Restriction fragment length polymorphism rflp analysis in the seronegative spondyloarthropathies snsa independent segregation of a 9.2 kb pvu ii b7 complementary dna rflp and b27 haplotypes Reveille, J.D.; Phelps, P.; Acton, R.T.; Koopman, W.J.; Barger, B.O.; Mcdaniel, D.O. Arthritis and Rheumatism 30(4 Suppl): S24 1987 2326-5191 https://eurekamag.com/research/029/092/029092774.php