1. Emergency Department , Vajira Hospital, , Dusit, Bangkok 10300 , Thailand
2. Navamindradhiraj University , Vajira Hospital, , Dusit, Bangkok 10300 , Thailand
3. Geriatric Emergency Research Unit , Emergency Department, Vajira Hospital, , 681 Samsen Road, Dusit, Bangkok 10300 , Thailand
4. Navamindradhiraj University , Emergency Department, Vajira Hospital, , 681 Samsen Road, Dusit, Bangkok 10300 , Thailand