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	1.	Khat chewing is a risk factor of duodenal ulcer. [electronic resource] by Raja'a, Y A Noman, T A Al-Warafi, A K Al Mashraki, N A Al Yosofi, A M Producer: 20010705 In: Saudi medical journal vol. 21 Availability: No items available. Save to lists Add to cart (remove)
	2.	Khat chewing is a risk factor of duodenal ulcer. [electronic resource] by Raja'a, Y A Noman, T A al Warafi, A K al Mashraki, N A al Yosofi, A M Producer: 20030502 In: Eastern Mediterranean health journal = La revue de sante de la Mediterranee orientale = al-Majallah al-sihhiyah li-sharq al-mutawassit vol. 7 Availability: No items available. Save to lists Add to cart (remove)

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