KSTP.com | Charlie Knuth of Darboy has second stem cell transplant Appleton Post Crescent Charlie Knuth, the 6-year-old Darboy boy with a rare skin disease, is recovering from a second stem cell transplant that took place Saturday afternoon at a Minneapolis hospital. WI 6-year-old has 2nd stem cell transplant Wis. 6-year-old has 2nd stem cell transplant Charlie Knuth undergoes stem cell transplant Saturday |