Lithium in drinking water and suicide risk

Comment to the letter to the editor entitled “Lithium in drinking water and suicide risk” by Tomoyuki Kawada

“…In the Letter to the Editor entitled “Lithium in drinking water and suicide risk”, Tomoyuki Kawada (2022[ 6 ]) called for caution when interpreting ecological data, because associations recorded at a population-based level may not exert the same effect on an individual-based level. We strongly agree with Kawada's considerations.…”