title: Controversies surrounding the effects of beta S-haplotype and alpha-thalassemia-2 on the clinical severity of sickle cell anemia.
authors.forename: L S
authors.initials: LS
authors.lastname: Chan
authors.forename: D R
authors.initials: DR
authors.lastname: Powars
mesh_terms: D000755:Anemia, Sickle Cell / Q000235:genetics*; D005914:Globins / Q000235:genetics*; D006239:Haplotypes; D006801:Humans; D011379:Prognosis; D017085:alpha-Thalassemia / Q000235:genetics*
chemical_list: D005914:Globins