PT - JOURNAL ARTICLE AU - Boris Sobolev AU - Peter Brown AU - David Zelt AU - Samuel Shortt TI - Bias inherent in retrospective waiting-time studies: experience from a vascular surgery waiting list DP - 2000 Jun 27 TA - Canadian Medical Association Journal PG - 1821--1822 VI - 162 IP - 13 4099 - http://www.cmaj.ca/content/162/13/1821.short 4100 - http://www.cmaj.ca/content/162/13/1821.full SO - CMAJ2000 Jun 27; 162