%0 Journal Article %T Pulsatile drug delivery systems using hydrogels %A Yoshida, Ryo %A Sakai, Kiyotaka %A Okano, Teruo %A Sakurai, Yasuhisa %A , %J Advanced Drug Delivery Reviews %V 11 %N 1-2 %P 85-108 %@ 0169-409X %D 1993-07-01 %I Elsevier BV %~ DeepDyve