Before the operation, blood samples were obtained by venipuncture and the venous blood samples were taken after overnight fasting for at least 8 hours, during their follicular phase of menstrual cycle.
수술 전 정맥혈을 채취하고 월경주기의 난포기 동안 8시간 이상 금식한 후 정맥혈액을 채취하였다.