HONG KONG – South Korea's Helixmith Co. Ltd. has announced the results of a phase III trial extension testing VM-202 (donaperminogene seltoplasmid), a regenerative plasmid DNA gene therapy candidate, in diabetic peripheral neuropathy (DPN). But, while the Seoul-based company, formerly known as Viromed, said VM-202 met the primary safety and secondary efficacy endpoints for a DPN therapy at 12 months, investors are doubting that the results are trustworthy.