The authors would like to thank Assoc. Prof. Kajornsak Kantapanit, Assoc. Prof. Chupensri Wongbuddha, Prof. Pasuk Mahakkanukrauh MD., Assoc.Prof. Putipong Pukkaman, Asst. Prof. Pawin Puapornpong MD., Assoc. Prof. Sanguansak Rerksuppaphol MD. and Preecha Singhadej MD for recommending and providing the knowledge.