المصدر:Aboulghar , M , Albertini , D F , Allen , J F , Bhattacharya , S , Cottingham Terralis C , J , Evers , J L H , Geraedts , J P M , Glasier , A , Hunt , K , Hussein , J , La Vecchia , C , Luy , W , Michaud , P-A , Negri , E , Peters , S A E , Sethi , D , Baird , D T , Crosignani , P G , Devroey , P , Diedrich , K , Farquharson , R G , Fraser ....
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