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		Ara, Kefayat, 		Bahrami, Mohammad, 		Bahrami, Elham, 		Bahrami, Sima, 		Bahrami, Mohammad, 		Moosazadeh, Mahmood, AND 		Barati, Omid.
" Progesterone Therapy for the Prevention of Preterm Labor in Women with Single Risk-factor: A Systematic Review and Meta-analysis" <em>BALI MEDICAL JOURNAL</em> [Online], Volume 5 Number 1 (26 April 2016)