Derajat metilasi dna dan tingkat ekspresi mrna gen reseptor progesteron-b pr-b pada jaringan endometriosis peritoneum, endometrioma, endometrium dan darah menstruasi pasien endometriosis = Dna methylation and mrna expression level of progesterone receptor b pr-b gene in peritoneal endometriosis, endometrioma, endometrium and menstrual blood of endometriosis patients