Is the sentence natural English?
Ja-Liang Lin, the supervisor of Clinical Toxicology Division in Chang Gung Memorial Hospital, said, “Some of the dishonest businessmen use Hydrogen Peroxide solution (H2O2)or Pesticide bactericide to make disposable chopsticks. People should not use them.”
It's good enough.
I'd write "Ja-Liang Lin,
thesupervisor of the Clinical ... " And a space after the brackets.