Controversy on vitamin D and disease: A problem of factors, mediators, modulators, markers, confounders and covariates Isidoro Cano Rodríguez; María Dolores Ballesteros-Pomar;

PTH levels and establishment of reference intervals: Impact of vitamin D and renal function Luis Agustín Ramírez Stieben; María Lorena Brance; Marina Verónica Belardinelli; Diamela Bolzán; Estefanía Pustilnik; Rodolfo Néstor Feldman; Lucas Ricardo Brun;