RT Journal Article SR Electronic T1 Extruded collagen ophthalmic sutures. A clinical survey. JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 522 OP 527 DO 10.1136/bjo.54.8.522 VO 54 IS 8 A1 A Smith YR 1970 UL http://bjo.bmj.com/content/54/8/522.abstract AB