Immunomodulatory Activities of Flavonoids, Monoterpenoids, Triterpenoids, Iridoid Glycosides and Phenolic Compounds of Plantago Species - Chiang, Lien-Chai; Ng, Lean Teik; Chiang, Wen; Chang, Mei-Yin; Lin, Chun-Ching (Planta Medica, 2003)