* * 1 a 2 014 DOI 014 PMID 856 http://www.ncbi.nlm.nih.gov/pubmed/ 200 330 : 710 700 701 101 910 205 210 463 lnk:bull 01 02 03 04 05 06 07 08 09 10 11 12 461 lnk:perio 900 Abstract Abstract Thesis Report Report Review Review Article Article Article Article Erratum Erratum Conference proceedings Database Dictionary Directory Editorial Encyclopedia Letter Preprint Article Sub-Type subtype