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		Negara, I Ketut, 		Surya, IGP, 		Sanjaya, Hariyasa, 		Anantasika, AAN, AND 		Mahardika, I Made.
" Lower Serum Catalase Level is Associated with Preterm Labor among Pregnant Women at Sanglah Hospital Denpasar, Bali-Indonesia" <em>BALI MEDICAL JOURNAL</em> [Online], Volume 5 Number 3 (18 September 2016)