Validation of the accuracy of intraoperative lymphatic mapping and sentinel lymphadenectomy for early-stage melanoma - A multicenter trial. - Morton,D.L.; Thompson,J.F.; Essner,R.; Elashoff,R.; Stern,S.L.; Nieweg,O.E.; Roses,D.F.; Karakousis,C.P.; Mozzillo,N.; Reintgen,D.; Wang,H.J.; Glass,E.C.; et al. (Ann Surg, 1999)