array(2) { [0]=> int(0) [1]=> array(12) { ["ref_doc_id"]=> int(9383612) ["publisher_code"]=> int(39) ["base_code"]=> int(23) ["book_code"]=> int(2) ["page"]=> string(3) "106" ["sort"]=> int(25) ["body"]=> string(125) "1) Oh JK,et al:Prosthetic valve evaluation.The Echo Manual,3rd ed.Lippincott Williams & Wilkins, Philadelphia,2006,p.231." ["mol"]=> NULL ["pubmed"]=> NULL ["doi"]=> NULL ["group_id"]=> int(15) ["internal_flag"]=> bool(false) } }