array(2) { [0]=> int(0) [1]=> array(12) { ["ref_doc_id"]=> int(8936966) ["publisher_code"]=> int(28) ["base_code"]=> int(9) ["book_code"]=> int(1) ["page"]=> string(3) "104" ["sort"]=> int(85) ["body"]=> string(205) "1) The DCCT Research Group:The effects of intensive treatment of diabetes on the development and progression of long-term complication in insulin-dependent diabetes mellitus. N Engl J Med 1993;329:977-986." ["mol"]=> NULL ["pubmed"]=> NULL ["doi"]=> string(27) "10.1056/NEJM199309303291401" ["group_id"]=> int(2) ["internal_flag"]=> bool(false) } }