Any case or control participant with dermatological diseases other than psoriasis, polycystic ovarian syndrome, coronary artery disease, breast cancer, and/or blood transfusion in the last 6 months was excluded from the study.
Every case and control participant underwent the following steps

Determination of BMI.[34 (link)] Selected cases and controls included obese and nonobese participants

Evaluation for the presence of MS whose criteria were identified according to the National Cholesterol Education Program Adult Treatment Panel III[35 (link)]

Detection of PPAR-γ gene polymorphism by restriction fragment length polymorphism polymerase chain reaction (PCR).

DNA extraction from the whole blood was done using the GeneJET whole blood genomic DNA purification Mini Kit (Thermo Scientific Lithuania). DNA eluted in buffer AE was stored at −20°C for further PCR procedure.