Harteveld C, Traeger-Synodinos J, Ragusa A, Fichera M, Kanavakis E, Kattamis C, Giordano P, Schiliro G, Bernini L. Different geographic origins of Hb Constant Spring [alpha(2) codon 142 TAA-->CAA]. Haematologica 2001; 86(1):36-38.