Antinociceptive Mechanisms of Platycodin D Administered Intracerebroventricularly in the Mouse - Choi, Seong-Soo; Han, Eun-Jung; Lee, Tae-Hee; Lee, Jin-Koo; Han, Ki-Jung; Lee, Han-Kyu; Suh, Hong-Won (Planta Medica, 2002)