Clinical Observerships at Center of cranial base surgery, Department of Neurological surgery. University of Pittsburgh medical center, Pittsburgh., 2003
Clinical Observerships at Department of Pituitary and Hypothalamic Surgery. Toranomon Hospital, Tokyo., 1999
Advance Trauma Life Support Student Course. The American College of Surgeons and the Royal college of Surgeons of Thailand., 2002
Clinical Observerships at Center of cranial base surgery, Department of Neurological surgery. University of Pittsburgh medical center, Pittsburgh., 2003
Clinical Observerships at Department of Pituitary and Hypothalamic Surgery. Toranomon Hospital, Tokyo., 1999
Advance Trauma Life Support Student Course. The American College of Surgeons and the Royal college of Surgeons of Thailand., 2002