The safety and activity of polymerized ragweed: a double-blind, placebo-controlled trial in 81 patients with ragweed rhinitis. - Grammer,L.C.; Shaughnessy,M.A.; Bernhard,M.I.; Finkle,S.M.; Pyle,H.R.; Silvestri,L. (J Allergy Clin Immunol, 1987)