1 Centre for Drug Research, Universiti Sains Malaysia, 11800 Gelugor, Penang, Malaysia.
2 Department of Psychiatry and Psychotherapy, University Clinic, Friedrich-Alexander-University Erlangen-Nuremberg, Schwabachanlage 6, 91054 Erlangen, Germany.
3 Centre for Drug Research, Universiti Sains Malaysia, 11800 Gelugor, Penang, Malaysia. Electronic address: norsyifaharun@usm.my.