array(2) { [0]=> int(0) [1]=> array(12) { ["ref_doc_id"]=> int(8081773) ["publisher_code"]=> int(3) ["base_code"]=> int(77) ["book_code"]=> int(1) ["page"]=> string(2) "21" ["sort"]=> int(4) ["body"]=> string(175) "1) A predictive model for aggressive non-Hodgkin's lymphoma. The International Non-Hodgkin's Lymphoma Prognostic Factors Project. N Engl J Med 329(14):987-994, 1993." ["mol"]=> NULL ["pubmed"]=> string(7) "8141877" ["doi"]=> string(27) "10.1056/NEJM199309303291402" ["group_id"]=> int(3) ["internal_flag"]=> bool(false) } }