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		Negara, I., 		Surya, I., 		Sanjaya, H., 		Anantasika, A., & 		Mahardika, I.
2016 Sep 18.  Lower Serum Catalase Level is Associated with Preterm Labor among Pregnant Women at Sanglah Hospital Denpasar, Bali-Indonesia. BALI MEDICAL JOURNAL. [Online] 5:3