Oral vitamin K versus placebo to correct excessive anticoagulation in patients receiving warfarin: a randomized trial.

Crowther, Ma; Ageno, Walter; Garcia, D; Wang, L; Witt, Dm; Clark, Np; Blostein, Md; Kahn, Sr; Vesely, Sk; Schulman, S; Kovacs, Mj; Rodger, Ma; Wells, P; Anderson, D; Ginsberg, J; Selby, R; Siragusa, S; Silingardi, M; Dowd, Mb; Kearon, C.