Inhibition of lymphocyte activation by extracts and fractions of Kalanchoe, Alternanthera, Paullinia and Mikania species. - Moraes ,V.LG,.; Santos ,L.FM,.; Castro ,S.B,.; Loureiro ,L.H,.; Lima ,O.A,.; Souza ,M.LM,.; Yien ,L.MK,.; Rossi-Bergmann ,B,.; Costa ,S.S.. (Phytomedicine, 1994)