German S3 guidelines: anal abscess and fistula (second revised version).
Ommer A, Herold A, Berg E, Fürst A, Post S, Ruppert R, Schiedeck T, Schwandner O, Strittmatter B.
Ommer A, et al. Among authors: schwandner o.
Langenbecks Arch Surg. 2017 Mar;402(2):191-201. doi: 10.1007/s00423-017-1563-z. Epub 2017 Mar 1.
Langenbecks Arch Surg. 2017.
PMID: 28251361
Review.