The interaction of alpha-thalassemia and homozygous sickle-cell disease. - Higgs,D.R.; Aldridge,B.E.; Lamb,J.; Clegg,J.B.; Weatherall,D.J.; Hayes,R.J.; Grandison,Y.; Lowrie,Y.; Mason,K.P.; Serjeant,B.E.; Serjeant,G.R. (N Engl J Med, 1982)