stem cells

in 2005, research Woo-suk Hwang reported that he made immortal stem cells from human patients.  His research was hailed as a breakthrough for people affected by degenerative diseases, because stem cells may be used to repair a person’s own damaged cells.  Hwang published his results in a peer-reviewed journal.  In 2006, the journal retracted his paper after other scientists discovered that Hwang’s group had faked the data.  Does this incident show that results of scientific studies cannot be trusted?  Or does it confirm the usefulness of a scientific approach, because other scientists discovered and exposed the fraud?