The authors regret that the title that appears in the original article is incorrect. Methods of the assessment of radiometabolites in plasma by high-performance liquid chromatography (HPLC) in the supplementary should also be corrected. The author wrote “An aliquot of the supernatant was analyzed by radio-HPLC (Analytical column: Waters XBridge OST C18 (10 × 50 mm; particle size, 2.5 μm), acetonitrile (90%; A) and ammonium acetate (0.02 M; B) were used as mobile phases (40/60 A/B) at a flow rate of 5.0 mL/min.”. This was incorrect. The correct description is “An aliquot of the supernatant was analyzed by radio-HPLC with a C18 column (Main column: Waters Atlantis T3 OBD Prep, 10 × 150 mm; particle size, 5 μm; guard column: Waters Atlantis T3, 10 × 10 mm; particle size, 5 μm), and the mixture of acetonitrile (A) and water (B) were used as mobile phases (A/B, 40/60) at a flow rate of 4.5 mL/min.” The original article has been corrected.