Irvine-based Allergan Inc. said it will no longer sell its Lap-Band weight-loss device to companies affiliated with the 1-800-GET-THIN marketing company. The move comes amid state and federal investigations of surgery centers affiliated with the ad campaign. Five Southern California patients have died since 2009 following Lap-Band surgeries at clinics affiliated with 1-800-GET-THIN, according to lawsuits, autopsy reports and other public records. The California Department of Insurance is investigating the surgery centers for alleged insurance fraud, said David Althausen, a spokesman for the state agency.