Field TS, Cernieux J, Buist D, Geiger A, Lamerato L, Hart G, Bachman D, Krajenta R, Greene S, Hornbrook MC, Ansell G, Herrinton L, Reed G. Retention of enrollees following a cancer diagnosis within health maintenance organizations in the Cancer Research Network. J Natl Cancer Inst. 2004 Jan 21; 96(2):148-52.