TNF and polycystic ovary syndrome: ("Polycystic Ovary Syndrome"[Mesh] OR "PCOS") AND ("Tumor Necrosis Factor-alpha"[Mesh] OR "TNF-alpha" OR "TNF-α") AND (levels OR concentration) AND (observational OR "cross-sectional" OR "case-control" OR cohort) "Polycystic Ovary Syndrome" OR "PCOS" "Tumor Necrosis Factor-alpha" OR "TNF-alpha" OR "TNF-α" levels concentration observational "cross-sectional" "case-control" cohort.