{Reference Type}: Letter {Title}: Letter to the editor-Reflections on "Total valproate versus free valproate in therapeutic drug monitoring for bipolar disorder: A cross-sectional study". {Author}: Wei LC;Tan HK; {Journal}: Asia Pac Psychiatry {Volume}: 16 {Issue}: 2 {Year}: 2024 Jun {Factor}: 3.788 {DOI}: 10.1111/appy.12562