Racial and ethnic differences in the prevalence of metabolic syndrome and its components of metabolic syndrome in women with polycystic ovary syndrome: a regional cross-sectional study - Chan, Jessica L; Kar, Sujata; Vanky, Eszter; Papunen, Lauren Morin; Piltonen, Terhi; Puurunen, Johanna; Tapanainen, Juha s; Maciel, Gustavo Arantes Rosa; Soares Junior, Jose Maria; Baracat, Edmund Chada (American journal of obstetrics and gynecology, 2017)