There is a great Palmer-educated chiropractor in Seoul (he's also a western-educated M.D.). His name is Steven Song, and he brought me back from an L4-L5 hernia in 2007. He's miraculous.
He's at CNS Clinic. Daechi Station, 2nd floor above the Starbucks. If you sit in the last car of the subway train, you'll be closer to the exit escalator when you get off
(I think it's exit 8 ).