Blood ionized calcium is associated with clustered polymorphisms in the carboxyl-terminal tail of the calcium-sensing receptor. - Scillitani,A.; Guarnirei,V.; de Geronimo,S.; Muscarella,LA.; Battista,C.; D'Agruma,L.; Bertoldo,F.; Florio,C.; Minisola,S.; Hendy,G.; Cole,D. (J Clin Endocrinol Metab, 2004)