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2. Natural history of sickle cell anemia in Saudi Arabs;Perrine, R.P.; Pembrey, M.E.; John, P.; Perrine, S.; Shoup, F.;Ann Intern Med,1978
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4. Lack of influence of fetal hemoglobin levels or erythrocyte indices on the severity of sickle cell anemia;Powars, D.R.; Schroeder, W.A.; Weiss, J.N.; Chan, L.S.; Azen, S.P.;7 Clin Invest,1980
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